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, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with optical power; a center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 1.0≤CT4 / CT3<1.5; and a spacing distance T34 between the third lens and the fourth lens on the optical axis and a spacing distance T45 between the fourth lens and the fifth lens on the optical axis satisfy: 4.0<T34 / T45<15.5.

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] In recent years, with the rapid development of electronic products, people's demand for lightweight handheld electronic devices has been increasing, which has put forward higher requirements for optical imaging lenses used in handheld electronic devices.

[0003] Optical imaging lenses should not only have good imaging quality, but also have the characteristics of a large field of view. At the same time, since the size of the image plane has a great influence on the imaging effect of the optical imaging lens, that is, the larger the image plane, the more energy and information the optical imaging lens can receive. Therefore, an optical imaging lens with characteristics such as wide angle, large image plane, and good imaging quality is in line with the development trend of the contemporary lens field. 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, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens with optical power; a center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis can satisfy: 1.0≤CT4 / CT3<1.5; and a spacing distance T34 between the third lens and the fourth lens on the optical axis and a spacing distance T45 between the fourth lens and the fifth lens on the optical axis can satisfy: 4.0<T34 / T45<15.5.

[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, half of the maximum field of view Semi-FOV of the optical imaging lens may satisfy: Semi-FOV ≥ 65°.

[0007] In one embodiment, the curvature radius R9 of the object side surface of the fifth lens and the Abbe number V5 of the fifth lens may satisfy: -5.0 mm -1 <V5 / R9<-2.5mm -1 .

[0008] In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens may satisfy: 0.5<|f5| / f4<1.5.

[0009] In one embodiment, half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy the following: 1.0<ImgH / f<3.0.

[0010] In one embodiment, a center thickness CT6 of the sixth lens on the optical axis and a spacing distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 1.0<CT6 / T56<3.5.

[0011] In one embodiment, a center thickness CT3 of the third lens on the optical axis and a spacing distance T23 between the second lens and the third lens on the optical axis may satisfy: 0<CT3 / T23<2.5.

[0012] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R3 of the object-side surface of the second lens may satisfy: 1.0<R3 / R2<2.0.

[0013] In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens may satisfy: -2.5<f5 / f≤-1.5.

[0014] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens may satisfy: -1.5<f3 / f1<-1.0.

[0015] In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the distance T12 between the first lens and the second lens on the optical axis may satisfy: 1.0<R3 / T12<3.0.

[0016] In one embodiment, a curvature radius R4 of the image-side surface of the second lens and a curvature radius R5 of the object-side surface of the third lens may satisfy: -4.5<(R4+R5) / (R4-R5)<-2.5.

[0017] In one embodiment, a radius of curvature R8 of the image-side surface of the fourth lens and a refractive index N4 of the fourth lens may satisfy: -4.0 mm<R8 / N4<-2.0 mm.

[0018] 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 having optical power, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the curvature radius R9 of the object side surface of the fifth lens and the Abbe number V5 of the fifth lens can satisfy: -5.0 mm -1 <V5 / R9<-2.5mm -1 ; and the spacing distance T34 between the third lens and the fourth lens on the optical axis and the spacing distance T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 4.0<T34 / T45<15.5.

[0019] In one embodiment, a center thickness CT6 of the sixth lens on the optical axis and a spacing distance T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 1.0<CT6 / T56<3.5.

[0020] In one embodiment, a center thickness CT3 of the third lens on the optical axis and a spacing distance T23 between the second lens and the third lens on the optical axis may satisfy: 0<CT3 / T23<2.5.

[0021] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R3 of the object-side surface of the second lens may satisfy: 1.0<R3 / R2<2.0.

[0022] In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens may satisfy: -2.5<f5 / f≤-1.5.

[0023] In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens may satisfy: -1.5<f3 / f1<-1.0.

[0024] In one embodiment, half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy the following: 1.0<ImgH / f<3.0.

[0025] In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the distance T12 between the first lens and the second lens on the optical axis may satisfy: 1.0<R3 / T12<3.0.

[0026] In one embodiment, a curvature radius R4 of the image-side surface of the second lens and a curvature radius R5 of the object-side surface of the third lens may satisfy: -4.5<(R4+R5) / (R4-R5)<-2.5.

[0027] In one embodiment, a radius of curvature R8 of the image-side surface of the fourth lens and a refractive index N4 of the fourth lens may satisfy: -4.0 mm<R8 / N4<-2.0 mm.

[0028] In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens may satisfy: 0.5<|f5| / f4<1.5.

[0029] In one embodiment, a center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis may satisfy: 1.0≤CT4 / CT3<1.5.

[0030] In one embodiment, half of the maximum field of view Semi-FOV of the optical imaging lens may satisfy: Semi-FOV ≥ 65°.

[0031] 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, wide angle, large image surface and good imaging quality by reasonably allocating optical focal length and optimizing optical parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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:

[0033] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0034] 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;

[0035] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0036] 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;

[0037] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0038] 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;

[0039] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0040] 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;

[0041] Fig. 9 shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application; and

[0042] 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. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The features, principles and other aspects of the present application are described in detail below.

[0051] 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.

[0052] In exemplary embodiments, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may each have positive or negative power.

[0053] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 4.0<T34 / T45<15.5, wherein T34 is the distance between the third lens and the fourth lens on the optical axis, and T45 is the distance between the fourth lens and the fifth lens on the optical axis. More specifically, T34 and T45 may further satisfy: 4.2<T34 / T45<15.5.

[0054] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: Semi-FOV ≥ 65°, where Semi-FOV is half of the maximum field of view of the optical imaging lens. More specifically, Semi-FOV may further satisfy: Semi-FOV ≥ 69°. Meeting Semi-FOV ≥ 65° is beneficial for the optical imaging lens to correct various aberrations and to meet the high-definition imaging requirements of wide-angle lenses.

[0055] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.5<|f5| / f4<1.5, wherein f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens. More specifically, f5 and f4 may further satisfy: 0.8<|f5| / f4<1.5. Satisfying 0.5<|f5| / f4<1.5 is conducive to reasonably allocating the effective focal lengths of the fourth lens and the fifth lens, and is conducive to correcting the monochromatic aberration of the optical imaging lens.

[0056] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0<ImgH / f<3.0, where ImgH is half of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, and f is the total effective focal length of the optical imaging lens. More specifically, ImgH and f may further satisfy: 1.3<ImgH / f<2.8. Satisfying 1.0<ImgH / f<3.0 is conducive to achieving the characteristic of a small total length of the optical imaging lens.

[0057] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0<CT6 / T56<3.5, wherein CT6 is the center thickness of the sixth lens on the optical axis, and T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis. More specifically, CT6 and T56 may further satisfy: 1.2<CT6 / T56<3.3. Satisfying 1.0<CT6 / T56<3.5 can make the overall length of the optical imaging lens shorter and the structure more compact, while facilitating the correction of the axial chromatic aberration of the optical imaging lens.

[0058] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0<CT3 / T23<2.5, wherein CT3 is the center thickness of the third lens on the optical axis, and T23 is the spacing distance between the second lens and the third lens on the optical axis. More specifically, CT3 and T23 may further satisfy: 0.3<CT3 / T23<2.4. Satisfying 0<CT3 / T23<2.5 can make the total length of the optical imaging lens shorter and the structure more compact, and is also beneficial to correcting the monochromatic aberration of the optical imaging lens.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0<R3 / R2<2.0, wherein R2 is the radius of curvature of the image side surface of the first lens, and R3 is the radius of curvature of the object side surface of the second lens. More specifically, R3 and R2 may further satisfy: 1.0<R3 / R2<1.7. Satisfying 1.0<R3 / R2<2.0 is beneficial to correcting the vertical axis chromatic aberration of the optical imaging lens.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -2.5<f5 / f≤-1.5, where f5 is the effective focal length of the fifth lens, and f is the total effective focal length of the optical imaging lens. Satisfying -2.5<f5 / f≤-1.5 is beneficial to correcting the axial chromatic aberration of the system.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.5<f3 / f1<-1.0, where f1 is the effective focal length of the first lens and f3 is the effective focal length of the third lens. Satisfying -1.5<f3 / f1<-1.0 is beneficial to correcting the vertical axis chromatic aberration of the optical imaging lens.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0≤CT4 / CT3<1.5, wherein CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis. More specifically, CT4 and CT3 may further satisfy: 1.0≤CT4 / CT3<1.4. Satisfying 1.0≤CT4 / CT3<1.5 is conducive to correcting the field curvature of the off-axis field of view, and can also meet the needs of processing and production.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.0<R3 / T12<3.0, wherein R3 is the radius of curvature of the object side of the second lens, and T12 is the distance between the first lens and the second lens on the optical axis. More specifically, R3 and T12 may further satisfy: 1.0<R3 / T12<2.9. Satisfying 1.0<R3 / T12<3.0 is conducive to the reasonable allocation of the radius of curvature of the object side of the second lens, which is conducive to correcting various aberrations and reducing the influence of ghost images.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -4.5<(R4+R5) / (R4-R5)<-2.5, where R4 is the radius of curvature of the image side of the second lens, and R5 is the radius of curvature of the object side of the third lens. Satisfying -4.5<(R4+R5) / (R4-R5)<-2.5 is conducive to rationally planning the shapes of the second lens and the third lens, correcting the off-axis field curvature, and meeting the requirements of processing and production.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -4.0mm<R8 / N4<-2.0mm, where R8 is the radius of curvature of the image side surface of the fourth lens, and N4 is the refractive index of the fourth lens. More specifically, R8 and N4 may further satisfy: -3.7mm<R8 / N4<-2.1mm. Satisfying -4.0mm<R8 / N4<-2.0mm is beneficial to correcting the astigmatism aberration of the optical imaging lens.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -5.0 mm -1 <V5 / R9<-2.5mm -1 , where R9 is the radius of curvature of the object side of the fifth lens, and V5 is the Abbe number of the fifth lens. Satisfies -5.0mm -1 <V5 / R9<-2.5mm -1 , which is beneficial to reduce the chromatic aberration of optical imaging lenses.

[0067] 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, wide angle, large image surface 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 axial spacing between each lens, 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.

[0068] 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.

[0069] 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.

[0070] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0071] Example 1

[0072] 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.

[0073] like Figure 1As 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.

[0074] The first lens E1 has negative optical power, and its object side surface S1 is concave, 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 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 positive optical power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive 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.

[0075] 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).

[0076]

[0077] Table 1

[0078] In this example, the total effective focal length f of the optical imaging lens is 4.96 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 18.59 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens ImgH is 7.68 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 77.4°, and the aperture value Fno of the optical imaging lens is 2.99.

[0079] 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:

[0080]

[0081] 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. Table 2 below gives 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, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 , A 12 , A 14 and A 16 .

[0082] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.7627E-03 -9.0644E-05 3.5165E-06 -9.0132E-08 1.4337E-09 -1.2773E-11 4.8580E-14 S2 8.1412E-03 -1.9946E-03 6.4585E-04 -1.3181E-04 1.6069E-05 -1.0205E-06 2.5169E-08 S3 1.7600E-03 -4.6887E-04 9.4660E-04 -4.5170E-04 1.2086E-04 -1.6698E-05 8.5005E-07 S4 1.1632E-02 2.4285E-03 -8.8590E-04 7.9161E-04 -2.7390E-04 4.9264E-05 -4.1661E-06 S5 1.9177E-03 4.9773E-03 -7.9627E-03 8.1292E-03 -4.6122E-03 1.3696E-03 -1.6596E-04 S6 -1.0095E-02 4.1763E-03 -7.6622E-04 -2.6665E-06 3.1182E-05 -5.2490E-06 2.9934E-07 S7 -1.0993E-02 4.0573E-03 -8.6088E-04 1.1678E-04 -9.7971E-06 4.6345E-07 -9.4976E-09 S8 -9.2625E-03 1.0127E-03 3.6924E-04 -1.2373E-04 1.5009E-05 -8.4477E-07 1.8419E-08 S9 -3.6922E-03 -2.9472E-04 4.0947E-04 -1.1635E-04 1.3627E-05 -7.6133E-07 1.7037E-08 S10 -2.6639E-03 8.4083E-04 -1.6759E-04 1.6617E-05 -9.0559E-07 2.6091E-08 -3.1352E-10 S11 -1.4028E-02 1.2744E-03 -9.8329E-05 5.1154E-06 -1.5882E-07 2.6266E-09 -1.7766E-11 S12 -6.9456E-03 3.6444E-04 -1.6159E-05 4.4550E-07 -8.0331E-09 9.7327E-11 -6.4787E-13

[0083] Table 2

[0084] 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.

[0085] Example 2

[0086] 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.

[0087] 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.

[0088] The first lens E1 has negative optical power, and its object side surface S1 is concave, 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 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 positive optical power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive optical power, and its object side surface S11 is convex, and its image side surface S12 is convex. 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.

[0089] In this example, the total effective focal length f of the optical imaging lens is 2.88 mm, the total length TTL of the optical imaging lens is 22.00 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 7.73 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 77.4°, and the aperture value Fno of the optical imaging lens is 3.00.

[0090] 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). Table 4 shows 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.

[0091]

[0092] Table 3

[0093]

[0094]

[0095] Table 4

[0096] 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. FIG. 4A to FIG. 4DIt can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0097] Example 3

[0098] 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.

[0099] 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.

[0100] 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 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 positive optical power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is concave, and its image side surface S10 is concave. 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.

[0101] In this example, the total effective focal length f of the optical imaging lens is 3.42 mm, the total length TTL of the optical imaging lens is 22.00 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 6.30 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 70.0°, and the aperture value Fno of the optical imaging lens is 3.20.

[0102] 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). Table 6 shows 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.

[0103]

[0104]

[0105] Table 5

[0106] Face number A4 A6 A8 A10 A12 A14 A16 S1 9.0480E-04 -2.4392E-05 3.5001E-07 -2.7318E-09 1.1250E-11 -2.0453E-14 9.0851E-18 S2 5.8700E-03 -3.6778E-04 3.3086E-05 -1.8673E-06 5.7586E-08 -9.0463E-10 5.6452E-12 S3 -2.6456E-03 3.4368E-04 -2.4306E-06 -1.7703E-06 1.7221E-07 -8.1502E-09 1.4308E-10 S4 -1.7102E-03 1.0689E-03 -1.3806E-04 2.0603E-05 -2.6650E-06 2.0907E-07 -7.1244E-09 S5 3.0813E-03 -1.5324E-03 2.9677E-05 6.2489E-04 -4.7013E-04 1.4358E-04 -1.7467E-05 S6 -8.2429E-03 -1.0869E-04 -4.8391E-05 1.1366E-04 -2.7339E-05 2.9368E-06 -1.4138E-07 S7 -3.6309E-03 1.8744E-04 -1.9896E-04 8.5442E-05 -1.3572E-05 1.0117E-06 -3.0971E-08 S8 -4.2239E-03 1.4845E-03 -6.5747E-04 1.3483E-04 -1.6420E-05 1.1006E-06 -3.0616E-08 S9 -3.3072E-03 7.7003E-05 -3.4012E-04 1.0513E-04 -1.4429E-05 9.0721E-07 -2.1282E-08 S10 1.4994E-03 -1.4297E-03 2.5528E-04 -2.3517E-05 1.2239E-06 -3.4143E-08 3.9766E-10 S11 -3.8373E-04 -1.2961E-04 -2.1993E-06 6.4726E-07 -2.6859E-08 4.6843E-10 -3.1084E-12 S12 2.4084E-03 -2.3427E-04 5.6641E-06 1.7745E-07 -1.4691E-08 3.3348E-10 -2.5928E-12

[0107] Table 6

[0108] 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.

[0109] Example 4

[0110] 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.

[0111] 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.

[0112] The first lens E1 has negative power, and its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has positive 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.

[0113] In this example, the total effective focal length f of the optical imaging lens is 4.08 mm, the total length TTL of the optical imaging lens is 21.94 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 6.35 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 75.0°, and the aperture value Fno of the optical imaging lens is 3.00.

[0114] 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). Table 8 shows 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.

[0115]

[0116] Table 7

[0117]

[0118]

[0119] Table 8

[0120] Fig. 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different 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.

[0121] Example 5

[0122] 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.

[0123] 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.

[0124] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has negative 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 positive optical power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive 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 is 4.24 mm, the total length TTL of the optical imaging lens is 19.64 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 5.96 mm, half of the maximum field of view Semi-FOV of the optical imaging lens is 77.4°, and the aperture value Fno of the optical imaging lens is 2.99.

[0126] 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). Table 10 shows 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.

[0127]

[0128]

[0129] Table 9

[0130] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.5574E-03 -8.8113E-05 3.1324E-06 -6.8182E-08 8.9365E-10 -6.5157E-12 2.0322E-14 S2 6.7920E-03 -9.8959E-04 2.8064E-04 -5.6756E-05 6.4112E-06 -3.6310E-07 7.9071E-09 S3 5.6770E-03 1.2126E-05 3.5324E-04 -2.3332E-04 6.4570E-05 -8.9495E-06 4.5736E-07 S4 1.5809E-02 2.1213E-03 9.4017E-04 -1.4197E-03 8.4181E-04 -2.2513E-04 2.1806E-05 S5 1.1007E-04 1.6933E-02 -4.0154E-02 5.3487E-02 -3.9543E-02 1.5168E-02 -2.3459E-03 S6 -4.3795E-03 1.1356E-03 1.4930E-05 -1.5204E-04 6.7403E-05 -1.1572E-05 7.5241E-07 S7 -4.6497E-03 1.1123E-03 -1.7802E-04 1.8526E-05 -1.2292E-06 4.9647E-08 -1.0041E-09 S8 -1.0755E-02 2.4668E-03 -2.8489E-04 1.6847E-05 -6.3743E-07 2.5926E-08 -7.6492E-10 S9 -4.7673E-03 6.0862E-04 -1.0282E-04 2.2972E-07 5.3412E-07 -2.3589E-08 2.9492E-10 S10 -2.2103E-03 4.1614E-04 -1.0104E-04 1.0553E-05 -5.7521E-07 1.6189E-08 -1.8751E-10 S11 -1.4220E-02 1.1562E-03 -6.8399E-05 2.7882E-06 -7.2638E-08 1.0529E-09 -6.3664E-12 S12 -6.2637E-03 2.3216E-04 -3.8384E-06 -2.6852E-07 1.7155E-08 -3.9148E-10 3.2518E-12

[0131] Table 10

[0132] 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. 10DIt can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0133] In summary, Examples 1 to 5 respectively satisfy the relationships shown in Table 11.

[0134]

[0135]

[0136] Table 11

[0137] 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.

[0138] 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: The lens comprises, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens having optical power; The first lens has negative optical power, and its image side surface is concave; The object side surface of the second lens is convex, and the image side surface is concave; The third lens has positive refractive power, and its object side surface is convex, and its image side surface is convex; The fourth lens has positive refractive power, and its image side surface is convex; The fifth lens has negative optical power, and its object side surface is concave; The object side surface of the sixth lens is a convex surface; At least one of the second lens and the sixth lens has positive optical power; The number of lenses having optical power in the optical imaging lens is six; The center thickness CT3 of the third lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis satisfy: 1.0≤CT4 / CT3≤1.30; The distance T34 between the third lens and the fourth lens on the optical axis and the distance T45 between the fourth lens and the fifth lens on the optical axis satisfy: 4.21≤T34 / T45≤15.43; The curvature radius R3 of the object side surface of the second lens and the distance T12 between the first lens and the second lens on the optical axis satisfy: 1.05≤R3 / T12≤2.79; and The curvature radius R9 of the object side surface of the fifth lens and the Abbe number V5 of the fifth lens satisfy: -4.92 mm -1 ≤V5 / R9≤-2.58 mm -1 .

2. The optical imaging lens according to claim 1, wherein: Half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy the following conditions: 1.41≤ImgH / f≤2.

69.

3. The optical imaging lens according to claim 1, wherein: A center thickness CT6 of the sixth lens on the optical axis and a spacing distance T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1.26≤CT6 / T56≤3.

20.

4. The optical imaging lens according to claim 1, wherein: A center thickness CT3 of the third lens on the optical axis and a spacing distance T23 between the second lens and the third lens on the optical axis satisfy: 0.65≤CT3 / T23≤2.

33.

5. The optical imaging lens according to claim 1, wherein: A curvature radius R2 of the image-side surface of the first lens and a curvature radius R3 of the object-side surface of the second lens satisfy: 1.09≤R3 / R2≤1.

65.

6. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens satisfy: -2.39≤f5 / f≤-1.

5.

7. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: -1.41≤f3 / f1≤-1.

07.

8. The optical imaging lens according to claim 1, wherein: A curvature radius R4 of the image side surface of the second lens and a curvature radius R5 of the object side surface of the third lens satisfy: -4.32≤(R4+R5) / (R4-R5)≤-2.

43.

9. The optical imaging lens according to claim 1, wherein: A curvature radius R8 of the image-side surface of the fourth lens and a refractive index N4 of the fourth lens satisfy: -3.62 mm≤R8 / N4≤-2.12 mm.

10. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: 0.83≤|f5| / f4≤1.

40.

11. The optical imaging lens according to any one of claims 1 to 10, characterized in that: Half of the maximum field of view Semi-FOV of the optical imaging lens satisfies: 70.0°≤Semi-FOV≤77.4°.

Images