Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, from the object side to the image side along the optical axis, a first lens with negative optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power; and a sixth lens with positive optical power. Among them, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH satisfies: ImgH>5mm; and the maximum half field of view Semi-FOV of the optical imaging lens satisfies: tan(Semi-FOV)>1.2, so that the optical imaging lens has the characteristics of large image surface, wide angle, etc.

Description

Technical Field

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

[0002] With the rapid development of the semiconductor industry, portable electronic products are also developing rapidly. For example, in handheld devices, in order to achieve automatic stable balance during shooting and ensure high image quality, the optical imaging lens used in handheld devices not only needs to have a higher resolution, but also has higher requirements for the range of its field of view.

[0003] Since optical imaging lenses with a large field of view can contain more object information when imaging, optical imaging lenses with a large field of view have become a trend in lens development. At the same time, in order to obtain better resolution and more satisfactory imaging effects, optical imaging lenses also require a larger imaging surface, and the size of the imaging surface often determines the size of the pixel, so a large image surface means that the imaging of the optical imaging lens has a higher image pixel.

[0004] Therefore, the lenses currently used in portable electronic products are in urgent need of an optical imaging lens with a large image surface and a wide angle. Summary of the invention

[0005] The present application provides an optical imaging lens that can be applied to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art, such as an optical imaging lens with an ultra-large image surface and an ultra-wide angle.

[0006] One aspect of the present application provides an optical imaging lens, which may include, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power; and a sixth lens with positive optical power.

[0007] In one embodiment, half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens may satisfy: ImgH>5mm.

[0008] In one embodiment, the maximum half field of view Semi-FOV of the optical imaging lens may satisfy: tan(Semi-FOV)>1.2.

[0009] In one embodiment, the relative illumination RI corresponding to the maximum field angle of the optical imaging lens may satisfy: RI ≥ 40%.

[0010] In one embodiment, a radius of curvature R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens may satisfy: 1.0<|R9 / f5|<2.5.

[0011] In one embodiment, the effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens may satisfy: 2.00<f6 / f<3.50.

[0012] 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 CT3 of the third lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis may satisfy: 3.50<(CT1+CT2+CT3) / T12<7.00.

[0013] In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens element and the total effective focal length f of the optical imaging lens may satisfy: 2.0<R7 / f<7.5.

[0014] In one embodiment, the sum ΣCT of the center thicknesses of the first lens to the sixth lens on the optical axis and the sum ΣAT of the spacing distances between any two adjacent lenses of the first lens to the sixth lens on the optical axis in the optical imaging lens may satisfy: 2.0<ΣCT / ΣAT<3.5.

[0015] In one embodiment, the air interval between the fourth lens and the fifth lens on the optical axis and the air interval between the fifth lens and the sixth lens on the optical axis may satisfy: T45 / T56<1.0.

[0016] In one embodiment, the on-axis distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens and the on-axis distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens may satisfy: 1.4<|SAG22 / SAG42|<2.0.

[0017] In one embodiment, the combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.0<f23 / f<2.5.

[0018] In one embodiment, an edge thickness ET1 of the first lens, an edge thickness ET2 of the second lens, and an air interval T12 between the first lens and the second lens on the optical axis may satisfy: 2.5<(ET1+ET2) / T12<6.0.

[0019] In one embodiment, a distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and a distance TD from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis may satisfy: 0.7<TD / TTL<0.8.

[0020] In one embodiment, a distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and a distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis may satisfy: 3.0<TTL / BFL≤5.0.

[0021] In one embodiment, the on-axis distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens, the on-axis 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, and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 1.30<(|SAG51|+|SAG52|) / CT5<6.00.

[0022] Another aspect of the present application provides an optical imaging lens, which may include, 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 optical power, whose object side surface is convex; a fourth lens with optical power; a fifth lens with optical power; and a sixth lens with positive optical power.

[0023] In one embodiment, half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens may satisfy: ImgH>5mm.

[0024] In one embodiment, the relative illumination RI corresponding to the maximum field angle of the optical imaging lens may satisfy: RI ≥ 40%.

[0025] In one embodiment, a radius of curvature R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens may satisfy: 1.0<|R9 / f5|<2.5.

[0026] In one embodiment, the effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens may satisfy: 2.00<f6 / f<3.50.

[0027] 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 CT3 of the third lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis may satisfy: 3.50<(CT1+CT2+CT3) / T12<7.00.

[0028] In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens element and the total effective focal length f of the optical imaging lens may satisfy: 2.0<R7 / f<7.5.

[0029] In one embodiment, the sum ΣCT of the center thicknesses of the first lens to the sixth lens on the optical axis and the sum ΣAT of the spacing distances between any two adjacent lenses of the first lens to the sixth lens on the optical axis in the optical imaging lens may satisfy: 2.0<ΣCT / ΣAT<3.5.

[0030] In one embodiment, the air interval between the fourth lens and the fifth lens on the optical axis and the air interval between the fifth lens and the sixth lens on the optical axis may satisfy: T45 / T56<1.0.

[0031] In one embodiment, the on-axis distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens and the on-axis distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens may satisfy: 1.4<|SAG22 / SAG42|<2.0.

[0032] In one embodiment, the combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.0<f23 / f<2.5.

[0033] In one embodiment, an edge thickness ET1 of the first lens, an edge thickness ET2 of the second lens, and an air interval T12 between the first lens and the second lens on the optical axis may satisfy: 2.5<(ET1+ET2) / T12<6.0.

[0034] In one embodiment, a distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and a distance TD from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis may satisfy: 0.7<TD / TTL<0.8.

[0035] In one embodiment, a distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and a distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis may satisfy: 3.0<TTL / BFL≤5.0.

[0036] In one embodiment, the on-axis distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens, the on-axis 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, and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 1.30<(|SAG51|+|SAG52|) / CT5<6.00.

[0037] The optical imaging lens provided in the present application uses multiple lenses, such as the first lens to the sixth lens. By reasonably controlling the image height and the maximum field of view angle of the optical imaging lens and optimizing the optical focal length and surface shape of each lens, the optical imaging lens can achieve characteristics such as ultra-large image surface, ultra-wide angle and high imaging quality. At the same time, each lens has a compact structure and good molding and processing performance, which can improve the production yield of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0039] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0040] FIG. 2A to FIG. 2C The axial chromatic aberration curve, the astigmatism curve and the relative illumination curve of the optical imaging lens of Example 1 are respectively shown;

[0041] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0042] FIG. 4A to FIG. 4C The axial chromatic aberration curve, the astigmatism curve and the relative illumination curve of the optical imaging lens of Example 2 are respectively shown;

[0043] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0044] FIG. 6A to FIG. 6C The axial chromatic aberration curve, astigmatism curve and relative illumination curve of the optical imaging lens of Example 3 are respectively shown;

[0045] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0046] FIG. 8A to FIG. 8C The axial chromatic aberration curve, astigmatism curve and relative illumination curve of the optical imaging lens of Example 4 are respectively shown;

[0047] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0048] FIG. 10A to FIG. 10C The axial chromatic aberration curve, the astigmatism curve and the relative illumination curve of the optical imaging lens of Example 5 are respectively shown;

[0049] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0050] FIG. 12A to FIG. 12C The axial chromatic aberration curve, the astigmatism curve and the relative illumination curve of the optical imaging lens of Example 6 are respectively shown;

[0051] Fig.13 A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown; and

[0052] FIG. 14A to FIG. 14C The axial chromatic aberration curve, astigmatism curve and relative illumination curve of the optical imaging lens of Example 7 are respectively shown. DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0059] 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.

[0060] The features, principles and other aspects of the present application are described in detail below.

[0061] 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. In the first lens to the sixth lens, each adjacent two lenses may have an air gap between them.

[0062] In an exemplary embodiment, the first lens may have negative power; the second lens may have positive power or negative power; the third lens may have positive power or negative power; the fourth lens may have positive power or negative power; the fifth lens may have positive power or negative power; and the sixth lens may have positive power. Reasonable matching of the power and surface shape of each lens in the optical system ensures the rationality of the optical imaging lens structure, which is conducive to balancing and correcting various aberrations in the optical imaging system.

[0063] In example embodiments, the object-side surface of the first lens may be a concave surface, and the image-side surface may be a concave surface.

[0064] In example embodiments, the object-side surface of the second lens may be a convex surface, and the image-side surface may be a concave surface.

[0065] In example embodiments, the object-side surface of the third lens may be a convex surface.

[0066] In example embodiments, the object-side surface of the fourth lens may be a convex surface, and the image-side surface may be a convex surface.

[0067] In example embodiments, the object-side surface of the fifth lens may be a concave surface.

[0068] In example embodiments, the object-side surface of the sixth lens may be a convex surface.

[0069] In an exemplary embodiment, half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH may satisfy: ImgH>5mm. Reasonable control of the size of half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens can ensure that the optical imaging lens has high-definition imaging quality while having a smaller lens size.

[0070] In an exemplary embodiment, the maximum half field of view angle Semi-FOV of the optical imaging lens may satisfy: tan(Semi-FOV)>1.2. More specifically, Semi-FOV may satisfy 1.4<tan(Semi-FOV)<5.0. Reasonable control of the maximum half field of view angle of the optical imaging lens can make the optical imaging lens have a wide-angle characteristic.

[0071] In an exemplary embodiment, the relative illumination RI corresponding to the maximum field angle of the optical imaging lens may satisfy: RI ≥ 40%. More specifically, RI may satisfy 40% ≤ RI ≤ 60%. Reasonable control of the relative illumination corresponding to the maximum field angle of the optical imaging lens is conducive to obtaining a high-quality optical imaging system and can prevent the edge of the optical imaging lens from having dark corners due to insufficient illumination.

[0072] In an exemplary embodiment, the radius of curvature R9 of the object-side surface of the fifth lens and the effective focal length f5 of the fifth lens may satisfy: 1.0<|R9 / f5|<2.5. More specifically, |R9 / f5| may satisfy 1.2<|R9 / f5|<2.2. By controlling the ratio of the effective focal length of the fifth lens to the radius of curvature of the object-side surface within a reasonable numerical range, the effective focal length of the fifth lens may be effectively limited, which is beneficial to reasonably allocate the optical power of the optical imaging system and correct the field area of ​​the optical imaging lens.

[0073] In an exemplary embodiment, the effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens may satisfy: 2.00<f6 / f<3.50. By controlling the ratio of the effective focal length of the sixth lens to the total effective focal length of the optical imaging lens within a reasonable numerical range, the effective focal length of the sixth lens can be effectively limited, which is beneficial to correcting the axial chromatic aberration of the optical imaging system and reducing the risk of purple fringing in imaging.

[0074] In an exemplary 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 CT3 of the third lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis may satisfy: 3.50<(CT1+CT2+CT3) / T12<7.00. Reasonable control of the relationship between the center thicknesses of the first lens, the second lens, and the third lens on the optical axis and the air interval between the first lens and the second lens on the optical axis can reasonably allocate the lens thicknesses and air intervals of the first lens, the second lens, and the third lens, which is beneficial to correcting the vertical axis aberration of the optical imaging lens, and also meets the process requirements for producing the optical imaging lens.

[0075] In an exemplary embodiment, the radius of curvature R7 of the object side surface of the fourth lens and the total effective focal length f of the optical imaging lens may satisfy: 2.0<R7 / f<7.5. By controlling the ratio of the effective focal length of the fourth lens to the radius of curvature of the object side surface within a reasonable numerical range, the shape of the fourth lens may be effectively limited, which is beneficial to balancing the monochromatic aberration in the optical imaging system.

[0076] In an exemplary embodiment, the sum of the center thicknesses ΣCT of the first lens to the sixth lens on the optical axis and the sum of the spacing distances between any two adjacent lenses among the first lens to the sixth lens on the optical axis ΣAT may satisfy: 2.0<ΣCT / ΣAT<3.5. By controlling the ratio of the sum of the center thicknesses of the first lens to the sixth lens on the optical axis to the sum of the spacing distances between any two adjacent lenses among the first lens to the sixth lens on the optical axis within a reasonable numerical range, it is helpful to reasonably allocate the center thicknesses of the lenses in the optical imaging system and the air spacing between the adjacent lenses, and it is beneficial to balance the various aberrations of the optical imaging lens and reduce the occurrence of ghost images in imaging.

[0077] In an exemplary embodiment, the air spacing between the fourth lens and the fifth lens on the optical axis and the air spacing between the fifth lens and the sixth lens on the optical axis may satisfy: T45 / T56<1.0. More specifically, T45 / T56<0.1<T45 / T56<1.0. By controlling the ratio of the air spacing between the fourth lens and the fifth lens and the air spacing between the fifth lens and the sixth lens on the optical axis within a reasonable numerical range, the air spacing between the fourth lens, the fifth lens, and the sixth lens in the optical imaging system may be effectively balanced, which helps to balance the vertical axis chromatic aberration of the optical imaging lens.

[0078] In an exemplary embodiment, the on-axis distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens and the on-axis distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image side surface of the fourth lens may satisfy: 1.4<|SAG22 / SAG42|<2.0. By controlling the ratio of the sagitta of the image side surface of the second lens to the sagitta of the image side surface of the fourth lens within a reasonable numerical range, it is helpful to improve the processability of the optical imaging lens. For example, when the ratio is too large, it indicates that the processability of the optical imaging lens is poor. When the ratio is too small, it indicates that it is not conducive to correcting the field curvature of the off-axis field of view of the optical imaging lens.

[0079] In an exemplary embodiment, the combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.0<f23 / f<2.5. More specifically, f23 / f may satisfy 1.3<f23 / f<2.3. By controlling the ratio of the combined focal length of the second lens and the third lens to the total effective focal length of the optical imaging lens within a reasonable numerical range, it is beneficial to correct the axial chromatic aberration of the optical imaging system and improve the imaging effect of the optical imaging lens.

[0080] In an exemplary embodiment, the edge thickness ET1 of the first lens, the edge thickness ET2 of the second lens, and the air interval T12 between the first lens and the second lens on the optical axis may satisfy: 2.5<(ET1+ET2) / T12<6.0. Reasonable control of the relationship between the edge thickness of the first lens, the edge thickness of the second lens, and the air interval between the first lens and the second lens on the optical axis is conducive to reducing the influence of spherical aberration in the optical imaging system while meeting the process requirements for producing optical imaging lenses.

[0081] In an exemplary embodiment, the distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and the distance TD from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis may satisfy: 0.7<TD / TTL<0.8. By controlling the ratio of the total optical length of the optical imaging lens to the distance from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis within a reasonable numerical range, it is beneficial to correct the astigmatism of the optical imaging system while meeting the process requirements for producing the optical imaging lens.

[0082] In an exemplary embodiment, the distance TTL from the object side of the first lens to the imaging plane on the optical axis and the distance BFL from the image side of the sixth lens to the imaging plane on the optical axis may satisfy: 3.0<TTL / BFL≤5.0. More specifically, TTL / BFL may satisfy 3.3<TTL / BFL≤5.0. By controlling the ratio of the total optical length of the optical imaging lens to the distance from the image side of the sixth lens to the imaging plane on the optical axis within a reasonable numerical range, it is beneficial to meet the process requirements for producing optical imaging lenses while matching the chip of the camera module.

[0083] In an exemplary embodiment, the on-axis distance SAG51 from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens, the on-axis 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, and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 1.30<(|SAG51 / SAG52|) / CT5<6.00. By reasonably controlling the relationship between the sagitta of the object side surface of the fifth lens, the sagitta of the image side surface, and the center thickness of the fifth lens on the optical axis, an optical imaging lens with high imaging quality can be obtained while taking into account the process requirements for producing optical imaging lenses.

[0084] In an exemplary embodiment, the optical imaging lens may further include an aperture. The aperture may be disposed at an appropriate position as required. For example, the aperture may be disposed between the third lens and the fourth lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0085] The present application proposes an optical imaging lens with characteristics such as an ultra-large image surface and an ultra-wide angle. The optical imaging lens according to the above-mentioned embodiment of the present application can use multiple lenses, such as the six lenses mentioned above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial 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, making the optical imaging lens more conducive to production and processing.

[0086] In an exemplary embodiment, 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 an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having 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.

[0087] 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.

[0088] 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.

[0089] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0090] Example 1

[0091] The following reference Figures 1 to 2C An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 is a schematic diagram showing the structure of an optical imaging lens according to Example 1 of the present application.

[0092] like Figure 1 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0093] 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 concave. 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.

[0094] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0095]

[0096]

[0097] Table 1

[0098] In this embodiment, the total effective focal length f of the optical imaging lens is 5.00 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S15 is 20.50 mm, and half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=7.94 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 78.54°, the aperture value Fno of the optical imaging lens is 3.00, and the relative illumination RI corresponding to the maximum field of view of the optical imaging lens is 46%.

[0099] 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:

[0100]

[0101] 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, 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 , A18 and A 20 .

[0102] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.3262E-03 -2.2750E-05 2.3370E-07 -5.3290E-10 -9.6436E-12 3.2424E-14 4.4217E-16 0.0000E+00 0.0000E+00 S2 -1.0517E-02 1.7540E-03 -1.7425E-04 1.2888E-05 -6.3017E-07 1.7987E-08 -2.1761E-10 0.0000E+00 0.0000E+00 S3 3.2280E-03 -1.0917E-04 -5.8209E-05 6.6397E-06 -3.2661E-07 7.9931E-09 -7.8941E-11 0.0000E+00 0.0000E+00 S4 1.2978E-02 3.1685E-04 -2.7767E-04 -5.3610E-05 1.5187E-05 -1.2045E-06 3.1507E-08 0.0000E+00 0.0000E+00 S5 2.8719E-03 -1.4169E-04 7.5671E-05 -2.4940E-05 4.6509E-06 -4.2152E-07 1.6502E-08 0.0000E+00 0.0000E+00 S6 2.6566E-02 -1.6134E-02 2.4394E-02 -2.2898E-02 1.2553E-02 -3.6411E-03 4.3511E-04 0.0000E+00 0.0000E+00 S7 2.9456E-02 -1.5687E-02 1.7777E-02 -1.4877E-02 7.3736E-03 -1.9495E-03 2.1269E-04 0.0000E+00 0.0000E+00 S8 -3.2265E-03 9.0088E-03 -9.2282E-03 3.3491E-03 -5.8416E-04 4.8639E-05 -1.4881E-06 0.0000E+00 0.0000E+00 S9 -1.1256E-02 1.6938E-02 -1.2023E-02 3.8064E-03 -6.3444E-04 5.5588E-05 -2.1129E-06 0.0000E+00 0.0000E+00 S10 -2.0085E-02 1.2295E-02 -4.6863E-03 1.1561E-03 -1.8899E-04 2.0507E-05 -1.4247E-06 5.7344E-08 -1.0148E-09 S11 -1.8428E-03 3.3540E-04 -3.0726E-05 1.2726E-06 2.7202E-08 -6.0392E-09 3.0513E-10 -7.1139E-12 6.5159E-14 S12 5.6280E-04 -4.2487E-04 6.4920E-05 -6.2207E-06 4.0134E-07 -1.7240E-08 4.6843E-10 -7.2183E-12 4.7585E-14

[0103] Table 2

[0104] 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 relative illumination curve of the optical imaging lens of Example 1 is shown, which represents the relative illumination values ​​corresponding to different field angles. FIG. 2A to FIG. 2C It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0105] Example 2

[0106] The following reference Figures 3 to 4C An optical imaging lens according to Embodiment 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0107] like Figure 3 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0108] The first lens E1 has 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.

[0109] In this embodiment, the total effective focal length f of the optical imaging lens is 5.07 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 20.39 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=7.93 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 77.52°, the aperture value Fno of the optical imaging lens is 2.99, and the relative illumination RI corresponding to the maximum field of view of the optical imaging lens is 42%.

[0110] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0111]

[0112] Table 3

[0113] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. Table 4 below lists 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, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0114]

[0115]

[0116] Table 4

[0117] 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 relative illumination curve of the optical imaging lens of Example 2 is shown, which represents the relative illumination values ​​corresponding to different field angles. FIG. 4A to FIG. 4C It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0118] Example 3

[0119] The following reference Figures 5 to 6C 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.

[0120] like Figure 5 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0121] 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 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.

[0122] In this embodiment, the total effective focal length f of the optical imaging lens is 5.14 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 20.89 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=7.93 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 68.25°, the aperture value Fno of the optical imaging lens is 3.00, and the relative illumination RI corresponding to the maximum field of view of the optical imaging lens is 47%.

[0123] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0124]

[0125]

[0126] Table 5

[0127] In Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. Table 6 below lists 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, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0128] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.5265E-03 -2.6036E-05 2.9821E-07 -1.7050E-09 2.4229E-11 -8.5872E-13 8.3636E-15 0.0000E+00 0.0000E+00 S2 -7.2838E-03 7.9923E-04 -6.5362E-05 7.7219E-06 -7.2260E-07 4.1242E-08 -1.0047E-09 0.0000E+00 0.0000E+00 S3 1.0879E-02 -1.9253E-03 7.8929E-05 -1.3615E-06 4.7712E-07 -4.4410E-08 1.1310E-09 0.0000E+00 0.0000E+00 S4 1.8563E-02 -1.0655E-03 2.0316E-04 -3.1992E-04 7.5041E-05 -6.8051E-06 2.2083E-07 0.0000E+00 0.0000E+00 S5 5.0857E-03 -1.8047E-04 -9.7079E-05 2.4456E-05 -4.9288E-06 6.4205E-07 -3.4445E-08 0.0000E+00 0.0000E+00 S6 1.4973E-02 -6.5888E-03 7.1941E-03 -5.7774E-03 2.6823E-03 -6.5027E-04 6.4173E-05 0.0000E+00 0.0000E+00 S7 2.2233E-02 -8.3333E-03 4.3005E-03 -2.1290E-03 6.2040E-04 -8.7680E-05 3.6884E-06 0.0000E+00 0.0000E+00 S8 -3.7845E-04 2.8876E-03 -3.8395E-03 1.7333E-03 -4.2198E-04 5.4398E-05 -2.9194E-06 0.0000E+00 0.0000E+00 S9 -6.4112E-03 1.6414E-02 -1.2159E-02 4.4254E-03 -9.2205E-04 1.0368E-04 -4.8197E-06 0.0000E+00 0.0000E+00 S10 -1.4058E-02 1.6964E-02 -9.8811E-03 3.5682E-03 -8.2612E-04 1.2257E-04 -1.1242E-05 5.7914E-07 -1.2786E-08 S11 -4.6684E-03 7.3782E-04 -6.9424E-05 7.3757E-06 -8.0448E-07 5.8143E-08 -2.4148E-09 5.2940E-11 -4.7811E-13 S12 1.6686E-03 -6.4399E-04 8.1730E-05 -6.6966E-06 3.7277E-07 -1.2894E-08 2.1263E-10 3.7281E-14 -3.1200E-14

[0129] Table 6

[0130] 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 relative illumination curve of the optical imaging lens of Example 3 is shown, which represents the relative illumination values ​​corresponding to different field angles. FIG. 6A to FIG. 6C It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0131] Example 4

[0132] The following reference Figures 7 to 8C 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.

[0133] like Figure 7 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0134] 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.

[0135] In this embodiment, the total effective focal length f of the optical imaging lens is 5.05 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 20.64 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=7.93 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 74.43°, the aperture value Fno of the optical imaging lens is 2.99, and the relative illumination RI corresponding to the maximum field of view of the optical imaging lens is 49%.

[0136] Table 7 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0137]

[0138] Table 7

[0139] In Example 4, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. Table 8 below lists 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, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0140] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.6495E-03 -3.8289E-05 6.2502E-07 -4.9887E-09 -1.0683E-11 5.1016E-13 -2.4605E-15 0.0000E+00 0.0000E+00 S2 -1.1860E-02 2.1876E-03 -2.4709E-04 2.0221E-05 -1.1211E-06 3.8360E-08 -5.9681E-10 0.0000E+00 0.0000E+00 S3 -3.6441E-03 5.0212E-03 -1.3779E-03 1.6487E-04 -1.0377E-05 3.3977E-07 -4.5892E-09 0.0000E+00 0.0000E+00 S4 6.1948E-03 7.7775E-03 -2.3816E-03 3.4275E-05 5.4825E-05 -6.9368E-06 2.6907E-07 0.0000E+00 0.0000E+00 S5 3.9117E-03 -2.2084E-04 6.3049E-05 -6.2904E-05 1.5235E-05 -1.4788E-06 5.5816E-08 0.0000E+00 0.0000E+00 S6 2.1563E-02 -1.7667E-02 1.5244E-02 -9.8971E-03 4.0570E-03 -9.1463E-04 8.6056E-05 0.0000E+00 0.0000E+00 S7 3.6271E-02 -2.7480E-02 1.8977E-02 -1.0185E-02 3.4306E-03 -6.3574E-04 4.8145E-05 0.0000E+00 0.0000E+00 S8 2.2128E-03 -7.0520E-04 -8.4535E-04 1.3524E-04 2.8205E-05 -7.9046E-06 4.2627E-07 0.0000E+00 0.0000E+00 S9 1.1539E-03 3.1154E-03 -1.3329E-03 -3.0246E-04 1.9170E-04 -2.9714E-05 1.5472E-06 0.0000E+00 0.0000E+00 S10 -6.0495E-03 5.7079E-03 -1.6980E-03 2.2107E-04 -4.5962E-06 -1.5916E-06 6.4429E-08 1.1696E-08 -8.0357E-10 S11 -1.6546E-03 -2.0836E-04 7.5000E-05 -8.7708E-06 5.6918E-07 -2.2343E-08 5.2488E-10 -6.7647E-12 3.6699E-14 S12 3.0073E-03 -8.1655E-04 8.8358E-05 -6.3577E-06 3.3357E-07 -1.2659E-08 3.2337E-10 -4.8867E-12 3.2595E-14

[0141] Table 8

[0142] 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 relative illumination curve of the optical imaging lens of Example 4 is shown, which represents the relative illumination values ​​corresponding to different field angles. FIG. 8A to FIG. 8C It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0143] Example 5

[0144] The following reference Figures 9 to 10C 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.

[0145] like Fig. 9As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0146] 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.

[0147] In this embodiment, the total effective focal length f of the optical imaging lens is 5.07 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 20.39 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=7.93 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 77.52°, the aperture value Fno of the optical imaging lens is 2.99, and the relative illumination RI corresponding to the maximum field of view of the optical imaging lens is 42%.

[0148] Table 9 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0149]

[0150] Table 9

[0151] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 10 below lists 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, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0152]

[0153]

[0154] Table 10

[0155] 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 relative illumination curve of the optical imaging lens of Example 5 is shown, which represents the relative illumination values ​​corresponding to different field angles. FIG. 10A to FIG. 10C It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0156] Example 6

[0157] The following reference Figures 11 to 12C An optical imaging lens according to Example 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.

[0158] like Fig.11 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0159] 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 convex. 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.

[0160] In this embodiment, the total effective focal length f of the optical imaging lens is 5.56 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 22.20 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=7.94 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 65.84°, the aperture value Fno of the optical imaging lens is 2.99, and the relative illumination RI corresponding to the maximum field of view of the optical imaging lens is 54%.

[0161] Table 11 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0162]

[0163]

[0164] Table 11

[0165] In Example 6, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces. Table 12 below lists 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 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0166] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.6310E-03 -3.6102E-05 6.7343E-07 -1.2886E-08 2.4320E-10 -2.9666E-12 1.5908E-14 0.0000E+00 0.0000E+00 S2 -8.6580E-03 1.1531E-03 -1.0082E-04 8.2137E-06 -4.8364E-07 1.7109E-08 -2.6017E-10 0.0000E+00 0.0000E+00 S3 1.1280E-02 -2.8944E-03 3.2920E-04 -2.7169E-05 1.6077E-06 -5.6292E-08 8.4000E-10 0.0000E+00 0.0000E+00 S4 1.4785E-02 7.9722E-04 -8.5880E-04 7.3092E-05 2.7189E-06 -5.5173E-07 1.7109E-08 0.0000E+00 0.0000E+00 S5 3.9033E-03 -2.0421E-04 -9.5831E-06 3.8121E-06 -2.5675E-06 4.6755E-07 -2.5350E-08 0.0000E+00 0.0000E+00 S6 2.1236E-02 -1.6120E-02 1.2953E-02 -7.2645E-03 2.4838E-03 -4.6174E-04 3.5434E-05 0.0000E+00 0.0000E+00 S7 3.5471E-02 -2.7746E-02 2.1029E-02 -1.1887E-02 4.1147E-03 -7.8149E-04 6.1111E-05 0.0000E+00 0.0000E+00 S8 1.7077E-03 -1.2808E-03 1.6891E-04 -1.9215E-04 7.1106E-05 -1.1467E-05 6.4091E-07 0.0000E+00 0.0000E+00 S9 1.8025E-03 1.6662E-03 -1.0886E-03 3.4959E-06 6.2252E-05 -1.3321E-05 9.7383E-07 0.0000E+00 0.0000E+00 S10 -4.1417E-03 4.0414E-03 -1.2240E-03 1.5240E-04 6.0871E-06 -4.8355E-06 7.0271E-07 -4.7098E-08 1.2526E-09 S11 -1.9213E-03 8.2120E-05 2.0403E-05 -3.7717E-06 3.2732E-07 -1.6943E-08 5.2398E-10 -8.8887E-12 6.3371E-14 S12 4.5317E-04 -3.1682E-04 3.3982E-05 -2.0197E-06 6.3439E-08 -1.9342E-10 -5.7314E-11 1.7531E-12 -1.6843E-14

[0167] Table 12

[0168] 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 relative illumination curve of the optical imaging lens of Example 6 is shown, which represents the relative illumination values ​​corresponding to different field angles. FIG. 12A to FIG. 12C It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0169] Example 7

[0170] The following reference Figures 13 to 14C An optical imaging lens according to Embodiment 7 of the present application is described. Fig.13 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0171] like Fig.13 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0172] 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.

[0173] In this embodiment, the total effective focal length f of the optical imaging lens is 6.10 mm, the distance TTL from the object-side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis is 23.97 mm, half the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=7.93 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 55.93°, the aperture value Fno of the optical imaging lens is 2.99, and the relative illumination RI corresponding to the maximum field of view of the optical imaging lens is 59%.

[0174] Table 13 shows the basic parameters of the optical imaging lens of Example 7, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0175]

[0176] Table 13

[0177] In Example 7, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 14 below lists 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, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0178]

[0179]

[0180] Table 14

[0181] Fig.14A The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 14BThe astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 14C The relative illumination curve of the optical imaging lens of Example 7 is shown, which represents the relative illumination values ​​corresponding to different field angles. FIG. 14A to FIG. 14C It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0182] In summary, Examples 1 to 7 respectively satisfy the relationships shown in Table 15.

[0183] Conditional / Example 1 2 3 4 5 6 7 tan(Semi-FOV) 4.93 4.52 2.51 3.59 4.52 2.23 1.48 |R9 / f5| 1.36 1.22 1.25 1.22 1.22 2.11 1.79 f6 / f 2.07 2.53 2.33 2.42 2.53 3.41 2.08 (CT1+CT2+CT3) / T12 6.87 4.74 3.93 3.92 4.74 3.65 5.12 R7 / f 7.10 2.14 2.42 2.03 2.14 4.45 2.37 ΣCT / ΣAT 2.87 2.34 2.37 2.27 2.34 2.39 3.30 T45 / T56 0.14 0.43 0.86 0.27 0.43 0.19 0.56 |SAG22 / SAG42| 1.86 1.57 1.77 1.60 1.57 1.45 1.57 f23 / f 1.68 2.02 1.95 2.20 2.02 1.53 1.35 (ET1+ET2) / T12 5.65 3.44 3.14 3.14 3.44 2.85 3.63 TD / TTL 0.75 0.75 0.72 0.74 0.75 0.73 0.73 TTL / BFL 3.95 3.97 3.61 3.84 3.36 3.48 5.00 (|SAG51|+|SAG52|) / CT5 1.39 1.54 3.41 1.80 1.54 5.58 5.99

[0184] Table 15

[0185] 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 (but not limited to) technical features with similar functions disclosed in the present application.

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 concave; a second lens having optical power, wherein the object side surface is convex and the image side surface is concave; The third lens has positive power and its object side surface is convex; a fourth lens element having positive refractive power, whose object-side surface is convex and whose image-side surface is convex; a fifth lens element having negative optical power, whose object-side surface is concave; and a sixth lens having positive refractive power and a convex object-side surface; The number of lenses having optical power in the optical imaging lens is six; Wherein, half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfies: 5mm<ImgH≤7.94mm; and The maximum half field of view Semi-FOV of the optical imaging lens satisfies: 1.48≤tan(Semi-FOV)≤4.93; The effective focal length f6 of the sixth lens and the total effective focal length f of the optical imaging lens satisfy: 2.07≤f6 / f≤3.41; The curvature radius R9 of the object side surface of the fifth lens and the effective focal length f5 of the fifth lens satisfy: 1.2<|R9 / f5|≤2.11; 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 CT3 of the third lens on the optical axis, and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 3.65≤(CT1+CT2+CT3) / T12≤6.87; The curvature radius R7 of the object side surface of the fourth lens element and the total effective focal length f of the optical imaging lens satisfy: 2.0<R7 / f≤7.10; A distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and a distance BFL from the image side surface of the sixth lens to the imaging surface on the optical axis satisfy: 3.36≤TTL / BFL≤5.

0.

2. The optical imaging lens according to claim 1, wherein: The relative illumination RI corresponding to the maximum field angle of the optical imaging lens satisfies: 42%≤RI≤59%.

3. The optical imaging lens according to claim 1, wherein: The sum of the center thicknesses ΣCT of the first lens to the sixth lens on the optical axis and the sum of the spacing distances ΣAT of any two adjacent lenses from the first lens to the sixth lens on the optical axis satisfy: 2.27≤ΣCT / ΣAT≤3.

30.

4. The optical imaging lens according to claim 1, wherein: The air interval between the fourth lens and the fifth lens on the optical axis and the air interval between the fifth lens and the sixth lens on the optical axis satisfy: 0.1<T45 / T56≤0.

86.

5. The optical imaging lens according to claim 1, wherein: 1.45≤|SAG22 / SAG42|≤1.86, Among them, SAG22 is the on-axis distance from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens, and SAG42 is the on-axis distance from the intersection of the image side surface of the fourth lens and the optical axis to the vertex of the effective radius of the image side surface of the fourth lens.

6. The optical imaging lens according to claim 1, wherein: The combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical imaging lens satisfy: 1.35≤f23 / f≤2.

20.

7. The optical imaging lens according to claim 1, wherein: The edge thickness ET1 of the first lens, the edge thickness ET2 of the second lens, and the air interval T12 between the first lens and the second lens on the optical axis satisfy: 2.85≤(ET1+ET2) / T12≤5.

65.

8. The optical imaging lens according to any one of claims 1 to 7, characterized in that: The distance TTL from the object side surface of the first lens to the imaging surface on the optical axis and the distance TD from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis satisfy: 0.7<TD / TTL≤0.

75.

9. The optical imaging lens according to any one of claims 1 to 7, characterized in that: 1.39≤(|SAG51|+|SAG52|) / CT5<6.00, Among them, SAG51 is the on-axis distance from the intersection of the object side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object side surface of the fifth lens, SAG52 is the on-axis 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, and CT5 is the center thickness of the fifth lens on the optical axis.

Images