An optical imaging lens

Abstract

The present invention discloses an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens with a positive focal power; a second lens with a positive focal power, having a convex object side surface and a convex image side surface; a third lens with a focal power, having a concave object side surface and a convex image side surface; a fourth lens with a negative focal power; a fifth lens with a positive focal power; and a sixth lens with a negative focal power. Among them, the on-axis distance TTL from the object side surface of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: TTL / ImgH < 1.3, and the maximum field of view FOV of the optical imaging lens satisfies: 98° < FOV < 120°. The optical imaging lens provided by the present invention can achieve a small ratio of the total length of the wide-angle lens structure to the image plane compression by restricting the mutual relationship between the on-axis distance from the object side surface of the first lens to the imaging surface and half of the diagonal length of the effective pixel region on the imaging surface, realizing an ultra-thin design effect and having a good imaging effect.

Description

Technical Field

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

[0002] The lens is the most important optical imaging device on the camera. The lens made of optical glass collects and converges the light entering the lens and forms an image on the imaging medium. A more complex lens is composed of two or more pieces of optical glass, called a lens unit. The lens unit forms a whole as a camera lens. The quality of the camera lens directly affects the quality of the image.

[0003] Lens focal length is the main indicator of camera lens performance. Lenses can be divided into different types according to the length of the lens focal length, such as ultra-wide-angle lens, wide-angle lens, standard zoom lens, medium-telephoto zoom lens and super-telephoto zoom lens, including many fixed-focus lenses with different focal lengths.

[0004] In recent years, with the enhancement of the manufacturing capacity of mobile phone lenses, the development of mobile phone lenses has shown diversity, whether it is a telephoto lens with a compression effect of the picture ratio, a portrait lens with a large aperture for close-up shots of people, or even a microscopic lens that can capture tiny things in macro photography, all have achieved unprecedented development. In order to meet the increasing demand of photography enthusiasts for lenses, a wide-angle lens composed of six lenses is needed, which has a good imaging effect and gives people a sense of grandeur in the photography effect. Summary of the invention

[0005] The present invention aims to provide a wide-angle lens composed of six lenses, which has good imaging effect and magnificent photographic effect, thereby meeting the needs of photography enthusiasts for lens photographic effect.

[0006] The present invention provides an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens with positive optical power, whose object side surface is convex and whose image side surface is convex; a third lens with optical power, whose object side surface is concave and whose image side surface is convex; a fourth lens with negative optical power; a fifth lens with positive optical power; and a sixth lens with negative optical power.

[0007] The axial distance TTL from the object side of the first lens to the imaging surface and the half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH<1.3; the maximum field of view FOV of the optical imaging lens satisfies: 98° <FOV<120°。

[0008] According to one embodiment of the present invention, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy the following conditions: 1.5 <f1 / f<2.0。

[0009] According to one embodiment of the present invention, the effective focal length f4 of the fourth lens and the effective focal length f6 of the sixth lens satisfy the following condition: 1.5 <f4 / f6<2.5。

[0010] According to one embodiment of the present invention, a curvature radius R10 of the image-side surface of the fifth lens, a curvature radius R9 of the object-side surface of the fifth lens, and an effective focal length f5 of the fifth lens satisfy: 1.5<(R10-R9) / f5<4.5.

[0011] According to one embodiment of the present invention, a curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 0.5<(R3+R4) / (R3-R4)<1.0.

[0012] According to one embodiment of the present invention, the center thickness CT1 of the first lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy: 1.0<(CT1+CT6) / CT5<1.5.

[0013] According to one embodiment of the present invention, an axial distance TTL from the object side surface of the first lens to the imaging surface satisfies: TTL<4.2 mm.

[0014] According to one embodiment of the present invention, the effective focal length f2 of the second lens and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: 2.1 <f2 / ImgH<3.4。

[0015] According to one embodiment of the present invention, the composite focal length f23 of the second and third lenses, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 15 <f23 / (CT2+CT3)<18。

[0016] According to one embodiment of the present invention, the on-axis distance SAG52 between 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 on-axis distance SAG51 between 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 satisfies: 2.5 <SAG52 / SAG51<3.5。

[0017] According to one embodiment of the present invention, the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens, the on-axis distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, and the edge thickness ET6 of the sixth lens satisfy: -1.5<(SAG61+SAG62) / ET6<-0.5.

[0018] In one aspect, the present invention provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power; a second lens with positive optical power, whose object side surface is convex and whose image side surface is convex; a third lens with optical power, whose object side surface is concave and whose image side surface is convex; a fourth lens with negative optical power; a fifth lens with positive optical power; and a sixth lens with negative optical power.

[0019] The lenses are independent of each other, and there is an air gap between the lenses on the optical axis; the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length of the effective pixel area on the imaging surface ImgH satisfy: TTL / ImgH<1.3; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: 1.5 <f1 / f<2.0。

[0020] Beneficial effects of the present invention:

[0021] The optical imaging lens provided by the present invention includes multiple lenses, such as the first lens to the sixth lens. By constraining the relationship between the on-axis distance from the object side of the first lens to the imaging surface and half of the diagonal length of the effective pixel area on the imaging surface, a small ratio of the total length of the wide-angle lens structure to the image surface compression can be achieved, and an ultra-thin design effect can be achieved, which is conducive to the miniaturization of the system, and a wide-angle lens composed of six lenses is provided, which has a good imaging effect, and at the same time, the lens photography effect is magnificent and atmospheric, meeting the needs of photography enthusiasts for lens photography effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of the structure of a lens assembly of an optical imaging lens embodiment 1 of the present invention;

[0024] Figure 2a to Figure 2d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present invention;

[0025] Figure 3 Schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present invention;

[0026] Figures 4a to 4d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Embodiment 2 of the optical imaging lens of the present invention;

[0027] Figure 5 Schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present invention;

[0028] Figures 6a to 6d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 3 of the optical imaging lens of the present invention;

[0029] Figure 7 Schematic diagram of the lens group structure of Embodiment 4 of the optical imaging lens of the present invention;

[0030] Figures 8a to 8d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 4 of the optical imaging lens of the present invention;

[0031] Fig. 9 Schematic diagram of the lens group structure of Embodiment 5 of the optical imaging lens of the present invention;

[0032] Figures 10a to 10d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of Example 5 of the optical imaging lens of the present invention;

[0033] Fig.11 Schematic diagram of the structure of a lens group of an optical imaging lens embodiment 6 of the present invention;

[0034] Figures 12a to 12d They are respectively the axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 6 of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] 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 invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0037] 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.

[0038] 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.

[0039] In the description of the present invention, 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.

[0040] 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.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] Exemplary Embodiments

[0043] The optical imaging lens of an exemplary embodiment of the present invention includes six lenses, which include, 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, wherein each lens is independent of each other and has an air gap on the optical axis.

[0044] In the present exemplary embodiment, the first lens has a positive optical power; the second lens has a positive optical power, with its object side being convex and its image side being convex; the third lens may have a positive optical power or a negative optical power, with its object side being concave and its image side being convex; the fourth lens has a negative optical power; the fifth lens has a positive optical power; the sixth lens has a negative optical power. Reasonably matching the optical powers and surface shapes of the lenses in the optical imaging system is beneficial to both realizing the rationality of the structure of the optical imaging lens and realizing the ultra-clear photographing function of the lens, and reducing the sensitivity of the system to tolerances.

[0045] In the present exemplary embodiment, the conditional formula satisfied by the on-axis distance TTL from the object side of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel region on the imaging surface is: TTL / ImgH < 1.3. This can achieve a relatively small ratio of the total length of the wide-angle lens structure to the image plane compression, realize an ultra-thin design effect, and is beneficial to the miniaturization of the system. More specifically, TTL and ImgH satisfy: 1.16 ≤ TTL / ImgH ≤ 1.24.

[0046] In the present exemplary embodiment, the conditional formula satisfied by the maximum field of view FOV of the optical imaging lens is: 98° < FOV < 120°. Increasing the field of view can increase the shooting range of the lens, making the captured pictures have a grand and imposing feeling. More specifically, FOV satisfies: 98.5° ≤ FOV ≤ 103.3°.

[0047] In the present exemplary embodiment, the conditional formula satisfied by the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens is: 1.5 < f1 / f < 2.0. The first lens is beneficial to converging the light rays incident on the system. At the same time, by reasonably distributing the optical powers of the first lens and the optical imaging system, the compression ratio of the picture can be controlled, and the picture quality can be improved. More specifically, f1 and f satisfy: 1.51 ≤ f1 / f ≤ 1.63.

[0048] In the present exemplary embodiment, the conditional formula satisfied by the effective focal length f4 of the fourth lens and the effective focal length f6 of the sixth lens is: 1.5 < f4 / f6 < 2.5. Reasonably distributing the optical powers of the fourth lens and the sixth lens is beneficial to controlling the spherical aberration contributions generated by the fourth lens and the sixth lens lenses respectively, and further correcting the spherical aberration comprehensively. More specifically, f4 and f6 satisfy: 1.93 ≤ f4 / f6 ≤ 2.25.

[0049] In this exemplary embodiment, the conditional expression satisfied by the radius of curvature R10 of the image side surface of the fifth lens, the radius of curvature R9 of the object side surface of the fifth lens, and the effective focal length f5 of the fifth lens is: 1.5 < (R10 - R9) / f5 < 4.5. By controlling the relationship between the radius of curvature of the object side, the radius of curvature of the image side, and the effective focal length of the fifth lens, it is beneficial to optimize the shape of the fifth lens and improve the ghost image caused by the secondary reflection of the fifth lens itself. More specifically, R10, R9, and f5 satisfy: 1.59 ≤ (R10 - R9) / f5 ≤ 4.41.

[0050] In this exemplary embodiment, the conditional expression satisfied by the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens is: 0.5 < (R3 + R4) / (R3 - R4) < 1.0. By controlling the relationship between the radius of curvature of the object side surface and the image side surface of the second lens, it is beneficial to optimize the shape of the second lens, reduce the sensitivity of the second lens, and improve the process performance. More specifically, R3 and R4 satisfy: 0.76 ≤ (R3 + R4) / (R3 - R4) ≤ 0.98.

[0051] In this exemplary embodiment, the conditional expression satisfied by the central thickness CT1 of the first lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis is: 1.0 < (CT1 + CT6) / CT5 < 1.5. By controlling the relationship between the central thicknesses of the first lens, the sixth lens, and the fifth lens, it is beneficial to control the positional relationship of each lens and at the same time beneficial to distribute the optical power of each lens. Further, the purpose of distributing the spherical aberration of each system can be achieved, and finally the optimization correction of the overall spherical aberration can be realized. More specifically, CT1, CT6, and CT5 satisfy: 1.04 ≤ (CT1 + CT6) / CT5 ≤ 1.10.

[0052] In this exemplary embodiment, the conditional expression satisfied by the on-axis distance TTL from the object side surface of the first lens to the imaging surface is: TTL < 4.2 mm. This is beneficial to controlling the size of the structure and facilitating the miniaturization of the system. More specifically, TTL satisfies: 3.97 mm ≤ TTL ≤ 4.06 mm.

[0053] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f2 of the second lens and half of the diagonal length ImgH of the effective pixel region on the imaging surface is: 2.1 < f2 / ImgH < 3.4. By controlling the relationship between the effective focal length of the second lens and the image surface, it is beneficial to optimize the aberration of the system. More specifically, f2 and ImgH satisfy: 2.21 ≤ f2 / ImgH ≤ 3.23.

[0054] In the present exemplary embodiment, the conditional expressions satisfied by the combined focal length f23 of the second and third lenses, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis are: 15 < f23 / (CT2 + CT3) < 18. By controlling the proportional relationship between the combined focal length of the second and third lenses and the sum of the central thicknesses of the second and third lenses, while favorably controlling the lens shapes of the second and third lenses, the second and third lenses can be combined together to be similar to a doublet structure, which is favorable for correcting the spherical aberration and chromatic aberration of the system. More specifically, f23, CT2, and CT3 satisfy: 15.12 ≤ f23 / (CT2 + CT3) ≤ 17.66.

[0055] In the present exemplary embodiment, the conditional expression satisfied by the axial distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the vertex of the effective radius of the image side surface of the fifth lens and the axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the vertex of the effective radius of the object side surface of the fifth lens is: 2.5 < SAG52 / SAG51 < 3.5. By controlling the relationship between the vector height of the image side surface of the fifth lens and the sagittal height of the object side surface, it is favorable to constrain the shape of the fifth lens, control the lens opening angle of the fifth lens, and is favorable for improving the processability of the lens. At the same time, by changing the shape of the lens, it is beneficial to optimize the ghost images generated by the fifth lens. More specifically, SAG52 and SAG51 satisfy: 2.86 ≤ SAG52 / SAG51 ≤ 3.00.

[0056] In the present exemplary embodiment, the conditional expression satisfied by the axial distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis and the vertex of the effective radius of the object side surface of the sixth lens, the axial distance SAG62 between the intersection of the image side surface of the sixth lens and the optical axis and the vertex of the effective radius of the image side surface of the sixth lens, and the edge thickness ET6 of the sixth lens is: -1.5 < (SAG61 + SAG62) / ET6 < -0.5. By controlling the proportional relationship between the sum of the sagittal heights between the object side surface and the image side surface of the sixth lens and the edge thickness of the lens, it is favorable to optimize the lens shape of the sixth lens. Through the optimization of this shape, it is beneficial to improve the ghost images caused by total internal reflection of light when passing through the last lens, and at the same time, the field curvature of the system can be optimized, and the phenomenon of staggered field curvature of the internal reflection field of view can be changed. In addition, this can enhance the strength of the last lens and improve the processability of the lens processing. More specifically, SAG61, SAG62, and ET6 satisfy: -1.25 ≤ (SAG61 + SAG62) / ET6 ≤ -0.71.

[0057] In this exemplary embodiment, the optical imaging lens may further include a stop. The stop may be disposed at an appropriate position as required, for example, the stop may be disposed between the object side and the first 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.

[0058] The optical imaging lens according to the above embodiment of the present invention may use multiple lenses, such as the above six lenses. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, the optical imaging lens has a larger imaging surface, a wide imaging range, and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0059] 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 characteristics of the aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike the spherical lens with a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting the aspherical lens, the aberration that occurs 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.

[0060] 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 used as an example in the embodiments, the optical imaging lens is not limited to including six lenses, and the optical imaging lens may also include other numbers of lenses if necessary.

[0061] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings. Specific embodiment 1

[0063] Figure 1 Schematic diagram of the lens group structure of the optical imaging lens embodiment 1 of the present invention. The optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0064] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is 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 of surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0065] As shown in Table 1, it is a basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0066]

[0067]

[0068] Table 1

[0069] As shown in Table 2, in Example 1, the total effective focal length of the optical imaging lens is f=2.74 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 4.01 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=3.44 mm, and the maximum field of view FOV of the optical imaging lens is 102.4°.

[0070]

[0071] Table 2

[0072] The optical imaging lens in Example 1 satisfies:

[0073] TTL / ImgH=1.17, where TTL is the axial distance from the object side of the first lens to the imaging surface, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0074] FOV = 102.4°, where FOV is the maximum field of view of the optical imaging lens;

[0075] f1 / f=1.55, where f1 is the effective focal length of the first lens and f is the effective focal length of the optical imaging lens;

[0076] f4 / f6=2.20, where f4 is the effective focal length of the fourth lens, and f6 is the effective focal length of the sixth lens;

[0077] (R10-R9) / f5=4.41, where R10 is the radius of curvature of the image side surface of the fifth lens, R9 is the radius of curvature of the object side surface of the fifth lens, and f5 is the effective focal length of the fifth lens;

[0078] (R3+R4) / (R3-R4)=0.83, where R3 is the radius of curvature of the object side of the second lens, and R4 is the radius of curvature of the image side of the second lens;

[0079] (CT1+CT6) / CT5=1.08, where CT1 is the center thickness of the first lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis;

[0080] TTL=4.01 mm, where TTL is the axial distance from the object side of the first lens to the imaging surface;

[0081] f2 / ImgH=2.35, where f2 is the effective focal length of the second lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface;

[0082] f23 / (CT2+CT3)=17.09, where f23 is the combined focal length of the second and third lenses, CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis;

[0083] SAG52 / SAG51=2.80, wherein SAG52 is the on-axis distance between 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 SAG51 is the on-axis distance between 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;

[0084] (SAG61+SAG62) / ET6=-1.12, wherein SAG61 is the on-axis distance between the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens, SAG62 is the on-axis distance between the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, and ET6 is the edge thickness of the sixth lens.

[0085] 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:

[0086]

[0087] 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); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0088] In Example 1, 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 3 shows 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, A5 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0089] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 9.1916E-02 5.5362E+00 -1.5330E+02 2.6829E+03 -3.1461E+04 2.5593E+05 -1.4764E+06 6.1078E+06 -1.8131E+07 S2 -1.8001E-02 -2.0800E+00 8.0781E+01 -1.9614E+03 3.0860E+04 -3.3167E+05 2.5116E+06 -1.3620E+07 5.3097E+07 S3 -1.7114E-01 1.0997E+00 -2.3093E+01 2.5782E+02 -1.8566E+03 8.7830E+03 -2.7379E+04 5.5071E+04 -6.7716E+04 S4 -3.1208E-01 -3.5200E+00 7.3102E+01 -1.0402E+03 9.7250E+03 -6.1377E+04 2.6912E+05 -8.3194E+05 1.8097E+06 S5 -4.1776E-01 4.4141E+00 -1.4812E+02 2.5577E+03 -2.9414E+04 2.3649E+05 -1.3572E+06 5.6239E+06 -1.6864E+07 S6 1.2163E-01 -4.6638E-01 -4.4094E+00 3.9874E+01 -2.0868E+02 8.9125E+02 -3.0007E+03 7.2313E+03 -1.1831E+04 S7 -1.4033E-01 -2.1600E+00 3.0629E+01 -2.4220E+02 1.2068E+03 -4.0607E+03 9.4752E+03 -1.5352E+04 1.6913E+04 S8 -4.2344E-03 -6.0526E+00 5.9671E+01 -3.6453E+02 1.5335E+03 -4.6157E+03 1.0127E+04 -1.6314E+04 1.9237E+04 S9 2.4114E-01 -5.8273E+00 3.7513E+01 -1.5936E+02 4.7468E+02 -9.9660E+02 1.4826E+03 -1.5637E+03 1.1573E+03 S10 8.4074E-02 8.1661E-02 2.3123E-01 -8.2429E+00 4.3042E+01 -1.1848E+02 2.0645E+02 -2.4220E+02 1.9610E+02 S11 -4.8228E-01 6.3435E-01 -3.4664E-01 -2.7247E-01 6.7659E-01 -6.2776E-01 3.6056E-01 -1.4262E-01 4.0361E-02 S12 -3.7311E-01 6.3318E-01 -7.8847E-01 7.0413E-01 -4.5289E-01 2.0958E-01 -6.9376E-02 1.6183E-02 -2.5716E-03

[0090] Table 3

[0091] 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 image heights. 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. Figure 2a to Figure 2d It can be seen from the figure that the optical imaging lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0093] Figure 3 Schematic diagram of the lens group structure of embodiment 2 of the optical imaging lens of the present invention. The optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0094] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is 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 of surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0095] As shown in Table 4, it is a basic parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0096] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless 329.7072 STO Spherical endless -0.1793 S1 Aspheric 1.3013 0.3407 4.43 1.55 56.1 -3.3029 S2 Aspheric 2.5592 0.1938 6.7729 S3 Aspheric 34.8595 0.3573 7.63 1.55 56.1 50.5858 S4 Aspheric -4.7116 0.0726 15.3533 S5 Aspheric -5.9633 0.2137 -47.33 1.68 19.2 0.1775 S6 Aspheric -7.4316 0.1502 -1.6497 S7 Aspheric -3.4491 0.2200 -4.44 1.67 20.4 -55.2322 S8 Aspheric 21.5500 0.1222 90.0000 S9 Aspheric -5.7207 0.7300 1.55 1.55 56.1 0.5286 S10 Aspheric -0.7691 0.0285 -1.0198 S11 Aspheric 1.5317 0.4321 -1.97 1.54 55.7 -17.0915 S12 Aspheric 0.5647 0.6931 -3.4328 S13 Spherical endless 0.1036 1.52 64.2 S14 Spherical endless 0.3595 S15 Spherical endless

[0097] Table 4

[0098] As shown in Table 5, in Example 2, the total effective focal length of the optical imaging lens f=2.72 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis=4.02 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 ImgH=3.46 mm, and the maximum field of view FOV of the optical imaging lens=103.3°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0099]

[0100] Table 5

[0101] In Example 2, 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 6 shows 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, A5 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0102] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.0090E-01 5.3066E+00 -1.4766E+02 2.5805E+03 -3.0057E+04 2.4175E+05 -1.3719E+06 5.5474E+06 -1.5957E+07 S2 -1.8944E-02 -2.2349E+00 9.0587E+01 -2.2755E+03 3.6942E+04 -4.0868E+05 3.1779E+06 -1.7659E+07 7.0402E+07 S3 -1.7000E-01 1.1019E+00 -2.3169E+01 2.5542E+02 -1.8223E+03 8.6199E+03 -2.7164E+04 5.5858E+04 -7.1096E+04 S4 -2.8923E-01 -3.3202E+00 5.5159E+01 -7.0659E+02 6.3142E+03 -3.8754E+04 1.6533E+05 -4.9430E+05 1.0306E+06 S5 -3.9883E-01 4.5070E+00 -1.5703E+02 2.6585E+03 -2.9668E+04 2.3286E+05 -1.3171E+06 5.4246E+06 -1.6276E+07 S6 1.0781E-01 6.4999E-02 -1.6283E+01 1.6479E+02 -9.7621E+02 4.0000E+03 -1.1827E+04 2.5272E+04 -3.8418E+04 S7 -1.4941E-01 -1.5031E+00 2.0616E+01 -1.7264E+02 9.2701E+02 -3.3250E+03 8.1223E+03 -1.3560E+04 1.5219E+04 S8 2.1875E-03 -5.7890E+00 5.9622E+01 -3.8369E+02 1.6816E+03 -5.1980E+03 1.1580E+04 -1.8796E+04 2.2228E+04 S9 2.5450E-01 -5.8363E+00 4.0773E+01 -1.8746E+02 5.9143E+02 -1.2892E+03 1.9629E+03 -2.0991E+03 1.5651E+03 S10 7.9072E-02 -2.7424E-02 1.8254E+00 -1.6893E+01 7.1029E+01 -1.7946E+02 2.9974E+02 -3.4361E+02 2.7437E+02 S11 -5.3392E-01 9.9067E-01 -1.4549E+00 1.7434E+00 -1.7105E+00 1.3187E+00 -7.6494E-01 3.2516E-01 -9.9697E-02 S12 -4.1272E-01 7.7253E-01 -1.0744E+00 1.0773E+00 -7.7971E-01 4.0902E-01 -1.5620E-01 4.3477E-02 -8.7769E-03

[0103] Table 6

[0104] 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 image heights. 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. Figures 4a to 4d It can be seen from the figure that the optical imaging lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0106] Figure 5 Schematic diagram of the lens group structure of embodiment 3 of the optical imaging lens of the present invention. The optical imaging lens includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0107] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is 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 of surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0108] As shown in Table 7, it is a basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0109] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless 350.0000 STO Spherical endless -0.1781 S1 Aspheric 1.3236 0.3479 4.22 1.55 56.1 -3.4436 S2 Aspheric 2.8214 0.2016 6.8307 S3 Aspheric 451.8614 0.3594 8.20 1.55 56.1 90.0000 S4 Aspheric -4.5162 0.0799 14.3582 S5 Aspheric -5.4245 0.2444 -94.92 1.68 19.2 0.1350 S6 Aspheric -6.0319 0.1381 -4.5807 S7 Aspheric -2.9180 0.2200 -4.06 1.67 20.4 -61.8696 S8 Aspheric 38.8432 0.0964 90.0000 S9 Aspheric -5.6635 0.7300 1.53 1.55 56.1 -0.3336 S10 Aspheric -0.7614 0.0285 -1.0289 S11 Aspheric 1.6855 0.4560 -1.93 1.54 55.7 -15.4378 S12 Aspheric 0.5811 0.6916 -3.5019 S13 Spherical endless 0.1036 1.52 64.2 S14 Spherical endless 0.3580 S15 Spherical endless

[0110] Table 7

[0111] As shown in Table 8, in Example 3, the total effective focal length of the optical imaging lens f=2.75 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 on the optical axis=4.06 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 ImgH=3.44 mm, and the maximum field of view FOV of the optical imaging lens=101.9°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0112]

[0113]

[0114] Table 8

[0115] In Example 3, 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 9 shows 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, A5 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0116] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 9.6272E-02 5.2632E+00 -1.4977E+02 2.6739E+03 -3.1812E+04 2.6168E+05 -1.5239E+06 6.3602E+06 -1.9055E+07 S2 -1.8768E-02 -2.3826E+00 9.1039E+01 -2.1291E+03 3.2214E+04 -3.3325E+05 2.4321E+06 -1.2726E+07 4.7928E+07 S3 -1.6552E-01 5.4110E-01 -1.4428E+01 1.8167E+02 -1.5007E+03 8.2608E+03 -3.0356E+04 7.3188E+04 -1.1078E+05 S4 -4.2306E-01 1.7530E-01 6.8475E+00 -3.2450E+02 4.7345E+03 -3.8309E+04 1.9927E+05 -7.0419E+05 1.7163E+06 S5 -5.7272E-01 1.0139E+01 -2.7823E+02 4.4763E+03 -4.8772E+04 3.7485E+05 -2.0726E+06 8.3268E+06 -2.4325E+07 S6 2.2033E-01 -2.1027E+00 1.5616E+01 -1.2097E+02 6.7148E+02 -2.4890E+03 6.2654E+03 -1.0985E+04 1.3645E+04 S7 -1.4955E-01 -1.4287E+00 1.7283E+01 -1.2030E+02 5.2607E+02 -1.5753E+03 3.3699E+03 -5.2011E+03 5.6596E+03 S8 4.4205E-02 -5.0311E+00 4.2694E+01 -2.4147E+02 9.8770E+02 -2.9767E+03 6.6370E+03 -1.0928E+04 1.3178E+04 S9 2.5519E-01 -5.3265E+00 3.0136E+01 -1.1394E+02 3.1599E+02 -6.4054E+02 9.4053E+02 -9.9040E+02 7.3526E+02 S10 1.1505E-01 -4.0440E-01 3.7186E+00 -2.4006E+01 9.1328E+01 -2.2062E+02 3.5800E+02 -4.0146E+02 3.1484E+02 S11 -5.8508E-01 9.9932E-01 -1.0217E+00 5.3590E-01 -2.9519E-02 -1.5100E-01 1.1039E-01 -4.3051E-02 1.1230E-02 S12 -4.1467E-01 7.7938E-01 -1.0527E+00 1.0116E+00 -7.0077E-01 3.5268E-01 -1.2946E-01 3.4642E-02 -6.7104E-03

[0117] Table 9

[0118] Figure 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 image heights. Figure 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. Figures 6a to 6d It can be seen from the figure that the optical imaging lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0120] Figure 7 Schematic diagram of the lens group structure of embodiment 4 of the optical imaging lens of the present invention. The optical imaging lens includes, from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0121] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is 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 of the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0122] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness, and focal length are all millimeters (mm).

[0123] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless 329.7072 STO Spherical endless -0.1793 S1 Aspheric 1.2803 0.3442 4.11 1.55 56.1 -2.3093 S2 Aspheric 2.6970 0.2154 7.3697 S3 Aspheric 246.0244 0.3293 10.65 1.55 56.1 90.0000 S4 Aspheric -5.9453 0.0481 31.6640 S5 Aspheric -5.3869 0.2266 70.71 1.68 19.2 0.8912 S6 Aspheric -4.9247 0.1459 -5.9025 S7 Aspheric -3.5390 0.2234 -4.33 1.67 20.4 -68.6379 S8 Aspheric 16.0368 0.1019 66.6957 S9 Aspheric -3.4123 0.7300 1.66 1.55 56.1 0.7269 S10 Aspheric -0.7699 0.0296 -1.0192 S11 Aspheric 1.1275 0.4161 -2.24 1.54 55.7 -19.4035 S12 Aspheric 0.5068 0.6924 -3.7267 S13 Spherical endless 0.1036 1.52 64.2 S14 Spherical endless 0.3588 S15 Spherical endless

[0124] Table 10

[0125] As shown in Table 11, in Example 4, the total effective focal length f of the optical imaging lens is 2.66 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 3.97 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=3.30 mm, and the maximum field of view FOV of the optical imaging lens is 100.3°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0126]

[0127] Table 11

[0128] In Example 4, 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 12 shows 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, A62, A71, A72, A73, A74, A75 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0129]

[0130]

[0131] Table 12

[0132] Figure 8aThe 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 image heights. Figure 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. Figures 8a to 8d It can be seen from the figure that the optical imaging lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0134] Fig. 9 Schematic diagram of the lens group structure of embodiment 5 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0135] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is 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 of the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0136] As shown in Table 13, it is a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0137]

[0138]

[0139] Table 13

[0140] As shown in Table 14, in Example 5, the total effective focal length f of the optical imaging lens is 2.72 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 4.00 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=3.25 mm, and the maximum field of view FOV of the optical imaging lens is 98.9°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0141]

[0142] Table 14

[0143] 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 15 shows 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, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0144]

[0145]

[0146] Table 15

[0147] 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 image heights. 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. Figures 10a to 10d It can be seen from the figure that the optical imaging lens provided in Example 5 can achieve good imaging quality. Specific embodiment 6

[0149] Fig.11 Schematic diagram of the lens group structure of embodiment 6 of the optical imaging lens of the present invention. The optical imaging lens comprises, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7 and an imaging surface S15.

[0150] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is 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 of the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0151] As shown in Table 16, it is a basic parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0152]

[0153]

[0154] Table 16

[0155] As shown in Table 17, in Example 6, the total effective focal length f of the optical imaging lens is 2.73 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 4.00 mm, half of the diagonal length of the effective pixel area on the imaging surface S15 is ImgH=3.24 mm, and the maximum field of view FOV of the optical imaging lens is 98.5°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0156]

[0157] Table 17

[0158] In Example 6, 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 18 shows 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, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0159] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 7.7037E-02 4.2020E+00 -1.0451E+02 1.6651E+03 -1.7518E+04 1.2423E+05 -5.9374E+05 1.8477E+06 -3.2814E+06 S2 -1.2484E-02 -1.5740E+00 5.6749E+01 -1.2954E+03 1.9230E+04 -1.9553E+05 1.4039E+06 -7.2357E+06 2.6879E+07 S3 -1.5005E-01 1.7587E-01 -7.5128E+00 9.3174E+01 -6.9661E+02 3.1781E+03 -8.6316E+03 1.2211E+04 -3.6241E+03 S4 -2.7487E-02 -8.1406E+00 1.3690E+02 -1.7172E+03 1.4780E+04 -8.8105E+04 3.7097E+05 -1.1126E+06 2.3619E+06 S5 -1.4384E-01 3.0490E+00 -1.6051E+02 3.0079E+03 -3.5800E+04 2.9199E+05 -1.6830E+06 6.9702E+06 -2.0839E+07 S6 1.8898E-01 4.6611E-01 -2.0087E+01 1.7607E+02 -1.0071E+03 4.1527E+03 -1.2377E+04 2.6291E+04 -3.9097E+04 S7 -2.4785E-01 5.7759E-01 -1.9919E+00 -5.2758E+00 8.0383E+01 -4.2360E+02 1.3607E+03 -2.8386E+03 3.8209E+03 S8 -9.0759E-02 -3.2842E+00 2.9225E+01 -1.6912E+02 7.0203E+02 -2.1287E+03 4.7415E+03 -7.7666E+03 9.2996E+03 S9 2.7812E-01 -4.6425E+00 2.5240E+01 -9.2907E+01 2.4158E+02 -4.2180E+02 4.4654E+02 -1.8010E+02 -2.0675E+02 S10 7.2856E-02 2.2695E-01 -7.1224E-01 -4.0506E+00 2.9277E+01 -8.5289E+01 1.4896E+02 -1.7154E+02 1.3492E+02 S11 -3.9115E-01 3.2318E-01 2.8028E-01 -1.1249E+00 1.4986E+00 -1.2017E+00 6.5366E-01 -2.5252E-01 7.0463E-02 S12 -3.2847E-01 4.7143E-01 -4.6377E-01 2.8643E-01 -8.9300E-02 -1.1767E-02 2.6845E-02 -1.4000E-02 4.2647E-03

[0160] Table 18

[0161] 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. Figure 12b The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.12c The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12d The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 12a to 12d It can be seen from the figure that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0162] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens has six lenses with optical power, and the six lenses include, in order from the object side to the image side along the optical axis: The first lens has positive refractive power, and its object side surface is convex and its image side surface is concave; The second lens has positive power, and its object-side surface is convex and its image-side surface is convex; a third lens having positive or negative power, whose object side surface is concave and whose image side surface is convex; a fourth lens element having negative optical power, whose object-side surface is concave and whose image-side surface is concave; A fifth lens having positive refractive power, whose object side surface is concave and image side surface is convex; a sixth lens having negative optical power, whose object side surface is convex and whose image side surface is concave; Wherein, the on-axis distance TTL from the object side of the first lens to the imaging plane and half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfy: 1.16≤TTL / ImgH≤1.24; the maximum field of view FOV of the optical imaging lens satisfies: 98.5°≤FOV≤103.3°; A curvature radius R10 of the image side surface of the fifth lens, a curvature radius R9 of the object side surface of the fifth lens, and an effective focal length f5 of the fifth lens satisfy: 1.59≤(R10-R9) / f5≤4.

41.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: 1.5 <f1 / f≤1.63。 3. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens and the effective focal length f6 of the sixth lens satisfy: 1.93≤f4 / f6≤2.

25.

4. The optical imaging lens according to claim 1, wherein: A curvature radius R3 of the object side surface of the second lens and a curvature radius R4 of the image side surface of the second lens satisfy: 0.76≤(R3+R4) / (R3-R4)<1.

0.

5. The optical imaging lens according to claim 1, wherein: A center thickness CT1 of the first lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy: 1.0<(CT1+CT6) / CT5≤1.

1.

6. The optical imaging lens according to claim 1, wherein: An axial distance TTL from the object side surface of the first lens to the imaging surface satisfies: 3.97 mm ≤ TTL ≤ 4.06 mm.

7. The optical imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens and half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfy the following: 2.21≤f2 / ImgH≤3.

23.

8. The optical imaging lens according to claim 1, wherein: The combined focal length f23 of the second and third lenses, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 15.12≤f23 / (CT2+CT3)≤17.

66.

9. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens and the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens satisfies: 2.8≤SAG52 / SAG51≤3.

10. The optical imaging lens according to claim 1, wherein: The on-axis distance SAG61 between the intersection of the object side of the sixth lens and the optical axis to the effective radius vertex of the object side of the sixth lens, the on-axis distance SAG62 between the intersection of the image side of the sixth lens and the optical axis to the effective radius vertex of the image side of the sixth lens, and the edge thickness ET6 of the sixth lens satisfy: -1.25≤(SAG61+SAG62) / ET6≤-0.71.

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