Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power, whose image side surface is a concave surface; a second lens with negative optical power, whose object side surface is a convex surface; a third lens with optical power; a fourth lens with positive optical power, whose object side surface is a convex surface and image side surface are convex surfaces; a fifth lens with negative optical power, whose object side surface is a concave surface and image side surface are concave surfaces; the optical imaging lens satisfies the following relationship: TTL / ImgH≤1.41; R10 / f5>‑0.6; 0.3<T45 / CT5<0.8; wherein TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface, f5 is the effective focal length of the fifth lens, R10 is the curvature radius of the image side surface of the fifth lens, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

Description

Technical Field

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

[0002] In recent years, with the development of science and technology, the imaging quality of optical imaging lenses installed in consumer electronic products such as mobile phones has become increasingly higher.

[0003] Since mobile phones and other products are expected to have a smaller size, especially a thinner thickness, the size of the optical imaging lens installed on them is also limited. When designing an optical imaging lens, it is not possible to simply scale down an optical imaging lens with better imaging quality to produce an optical imaging lens with both small size and good imaging quality. In addition, the market pays more attention to the appearance of consumer electronic products, for example, mobile phones are expected to have a larger screen-to-body ratio. This places strict requirements on the head size of the optical imaging lens.

[0004] In order to meet the needs of miniaturization and imaging requirements, an optical imaging lens is needed that can take into account the miniaturization of the lens head, the depth of the lens head and high imaging quality. Summary of the invention

[0005] On the one hand, the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power, whose image side surface may be a concave surface; a second lens with negative optical power, whose object side surface may be a convex surface; a third lens with optical power; a fourth lens with positive optical power, whose object side surface may be a convex surface and whose image side surface may be a convex surface; and a fifth lens with negative optical power, whose object side surface may be a concave surface and whose image side surface may be a concave surface.

[0006] In one embodiment, the optical imaging lens may satisfy the following relationship: TTL / ImgH≤1.41; wherein TTL is the distance from the object side of the first lens to the imaging plane of the optical imaging lens on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging plane.

[0007] In one embodiment, the optical imaging lens may satisfy the following relationship: R10 / f5>-0.6; wherein f5 is the effective focal length of the fifth lens, and R10 is the curvature radius of the image side surface of the fifth lens.

[0008] In one embodiment, the optical imaging lens may satisfy the following relationship: 0.3<T45 / CT5<0.8; wherein T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0009] In one embodiment, the object-side surface of the second lens may be a convex surface.

[0010] In one embodiment, the optical imaging lens further includes: a lens barrel; and a first lens, a second lens, a third lens, a fourth lens, and a fifth lens disposed in the lens barrel; wherein an outer diameter of the lens barrel at the object side end is smaller than an outer diameter of the lens barrel at the image side end.

[0011] In one embodiment, the inner wall surface of the lens barrel includes at least two steps, and the inner diameter of the inner wall surface increases from the object side end to the image side end.

[0012] In one embodiment, the outer surface of the inactive region of the second lens may be a sandblasted layer or a grooved surface.

[0013] In one embodiment, adjacent steps have a step difference, and the step difference between the step corresponding to the fourth lens and the step corresponding to the third lens can be the largest; the optical imaging lens also includes at least two spacers arranged between the third lens and the fourth lens, and the two spacers may include at least one metal spacer.

[0014] In one embodiment, the two spacers may include at least one plastic spacer.

[0015] In one embodiment, the optical imaging lens further includes a pressure ring disposed on the image side of the fifth lens.

[0016] In one embodiment, an on-axis distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and an 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 0<SAG41 / SAG42≤0.47.

[0017] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the sum ∑AT of the spacing distances between any two adjacent lenses with optical power from the first lens to the fifth lens on the optical axis may satisfy 3.8<TTL / ∑AT≤4.6.

[0018] In one embodiment, the sum of the spacing distances ∑AT between any two adjacent lenses having optical power among the first lens to the fifth lens on the optical axis, the spacing distance T12 between the first lens and the second lens on the optical axis, and the spacing distance T45 between the fourth lens and the fifth lens on the optical axis may satisfy 0<(T12+T45) / ∑AT<0.5.

[0019] In one embodiment, the combined focal length f12 of the first lens and the second lens and the total effective focal length f of the optical imaging lens may satisfy 1<f12 / f<1.6.

[0020] In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens may satisfy 0.6<f1 / f<1.2.

[0021] In one embodiment, the effective focal length f2 of the second lens, the curvature radius R3 of the object-side surface of the second lens, and the curvature radius R4 of the image-side surface of the third lens may satisfy -1.3<(R3+R4) / f2<-0.3.

[0022] In one embodiment, the effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens may satisfy 0.3<f4 / f<0.9.

[0023] In one embodiment, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens may satisfy 0<|R1 / R2|<0.4.

[0024] In one embodiment, a curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens may satisfy 0.6<(R7+R8) / (R7-R8)<1.2.

[0025] In one embodiment, a center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis may satisfy 0.2<CT3 / CT4<1.

[0026] On the other hand, the present application provides an optical imaging lens, comprising: a lens barrel; and a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in the lens barrel; wherein the outer diameter of the lens barrel at the object side end is smaller than the outer diameter of the lens barrel at the image side end; the inner wall surface of the lens barrel includes at least two steps, and the inner diameter of the inner wall surface increases from the object side end to the image side end.

[0027] The present application adopts five lenses, and through the reasonable allocation of the optical focal length, surface shape, center thickness of each lens and axial spacing between each lens, the above-mentioned optical imaging lens has at least one beneficial effect of miniaturized head, deep head depth and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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:

[0029] Figure 1 A schematic diagram of the structure of an optical imaging lens according to an embodiment of the present application is shown;

[0030] Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown; FIG. 3A to FIG. 3DThe axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0031] Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown; FIG. 5A to FIG. 5D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0032] Figure 6 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown; FIG. 7A to FIG. 7D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0033] Figure 8 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown; 9A to 9D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0034] Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown; FIG. 11A to FIG. 11D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0035] Fig.12 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown; FIG. 13A to FIG. 13D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown;

[0036] Fig.14 A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown; FIG. 15A to FIG. 15D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 7 are respectively shown;

[0037] Fig.16 A schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application is shown; FIG. 17A to FIG. 17D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 8 are respectively shown. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The optical imaging lens according to the exemplary embodiment of the present application may include, for example, five lenses with optical power, that is, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis. Among the first lens to the fifth lens, there may be an air gap between any two adjacent lenses. Exemplarily, among the first lens to the fifth lens, a lens without optical power may also be provided between any two adjacent lenses with optical power.

[0046] refer to Figure 1 In an exemplary embodiment, the optical imaging lens of the present application includes a lens barrel 100. The lens barrel 100 includes an object side end 110, an image side end 120, an inner wall surface 130 that penetrates the object side end 110 and the image side end 120, and an outer wall surface 140 that connects the outer periphery of the object side end 110 and the outer periphery of the image side end 120. It can be understood that in a plane substantially perpendicular to the optical axis, the direction away from the optical axis is the outer side.

[0047] The inner wall surface 130 of the lens barrel 100 includes at least two steps, and the inner diameter of the inner wall surface 130 increases along the direction from the object side to the image side of the optical axis. Specifically, the inner diameter of the step located on the image side is larger than the inner diameter of the step located on the object side. And each step may include a surface (cylindrical surface) with the same inner diameter. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4 and the fifth lens E5 are arranged in the lens barrel 100, and the inner wall surface 130 of the lens barrel 100 is used to define the assembly position of each lens. The circumference of any lens among the first lens E1 to the fifth lens E5 corresponds to a step, for example, the third lens E3 corresponds to the first step of the inner wall surface 130, the fourth lens E4 corresponds to the second step of the inner wall surface 130, and the first lens E1 corresponds to the third step of the inner wall surface 130. Generally, a step can be divided into a bearing surface parallel to the optical axis and a connecting surface connected to the adjacent step, and the connecting surface can be an inclined surface (conical surface) relative to the optical axis. The supporting surface of the first step and the supporting surface of the second step may have a radius difference relative to the optical axis, that is, a first step difference A.

[0048] The outer wall surface 140 of the lens barrel 100 includes a head section 141, which extends from the object side end 110 of the lens barrel 100 toward the image side end 120 of the lens barrel 100, and the outer diameter D of the head section 141 is smaller than the outer diameter of the image side end 120, and the head section 141 has a length H parallel to the optical axis direction, and the length H is not less than the head depth of the lens barrel 100. Exemplarily, the outer diameter D of the head section 141 is also smaller than the effective radius DT41 of the object side surface of the fourth lens E4.

[0049] The optical imaging lens provided in the present application has a lens barrel 100 with a smaller head and a deeper head depth. The optical imaging lens is suitable for being applied to the screen side of products such as mobile phones, and can obtain a mobile phone with a larger screen-to-body ratio.

[0050] In an exemplary embodiment, the optical imaging lens may further include at least one aperture. The aperture may be disposed at an appropriate position as required, for example, between the object side and the first lens E1. For example, the aperture is disposed between the object side and the lens barrel 100. 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.

[0051] In an exemplary embodiment, the optical imaging lens further includes a plurality of spacers, each of which may be disposed between each of the lenses.

[0052] In an exemplary embodiment, each adjacent step of the inner wall surface 130 has a step difference, wherein the first step corresponding to the third lens E3, that is, the first step, and the second step corresponding to the fourth lens E4, that is, the first step difference A is the largest. By maximizing the first step difference A, the optical imaging lens can maintain the characteristic of a small head.

[0053] The multiple spacers of the optical imaging lens include at least two spacers disposed between the third lens E3 and the fourth lens E4, and the two spacers include at least one metal spacer 210. By controlling the thickness and structure of the metal spacer 210, the resistance stability of the optical imaging lens is improved.

[0054] The two spacers between the third lens E3 and the fourth lens E4 include at least one plastic spacer 220. The plastic spacer 220 can be arranged in the object side direction or the image side direction of the metal spacer 210, and the thickness and inner diameter of the plastic spacer 220 can be adjusted accordingly. By setting an appropriate plastic spacer 220, it is helpful to block stray light, thereby improving the imaging quality of the optical imaging lens. Exemplarily, a metal spacer 230 is also included between the fourth lens E4 and the fifth lens.

[0055] In an exemplary embodiment, a pressure ring is further provided on the image side of the fifth lens E5. When the pressure ring is not provided on the image side of the fifth lens E5, the optical imaging lens has fewer parts, is more convenient to assemble, and has low cost. The provision of the pressure ring is conducive to improving the stability of the assembled optical imaging lens, making the optical imaging lens reliable.

[0056] According to an exemplary embodiment, the first lens E1 to the fifth lens E5 may have an optically effective area for optical imaging and an optically ineffective area extending outward from the periphery of the optically effective area. Generally speaking, the optically effective area refers to the area of ​​the lens used for optical imaging, and the optically ineffective area is the structural area of ​​the lens. During the assembly process of the optical imaging lens, each lens may be connected to the lens barrel 100 at the optically ineffective area of ​​each lens by a process connection method such as glue point bonding. During the imaging process of the optical imaging lens, the optically effective area of ​​each lens may transmit light from an object to form an optical path and form a final optical image; and the optically ineffective area of ​​each lens after assembly is accommodated in the lens barrel 100 that cannot transmit light, so that the optically ineffective area does not directly participate in the imaging process of the optical imaging lens. It should be noted that for ease of description, the present application divides each lens into two parts, namely, the optically effective area and the optically ineffective area, for description, but it should be understood that the optically effective area and the optically ineffective area of ​​the lens may be formed as a whole during the manufacturing process, rather than being formed as two separate parts.

[0057] In an exemplary embodiment, the second lens E2 corresponds to the fourth step of the inner wall surface 130, or the second lens E2 also corresponds to the third step. Exemplarily, the outer surface of the ineffective area of ​​the second lens E2 is a sandblasted layer or a grooved surface. The optical imaging lens of the present application has a smaller head, so the wall thickness of the portion of the lens barrel 100 corresponding to the head section 141 is thinner, and the step difference between the fourth step and the third step is smaller. By performing a sandblasting process or a grooving process on the surface of the ineffective area of ​​the second lens E2, a sandblasted layer or a grooved surface for reducing stray reflections can be obtained, and the stray light reflected and scattered in the inner wall surface 130 can be reduced, thereby improving the imaging quality of the optical imaging lens.

[0058] In an exemplary embodiment, the first lens has positive optical power, and its image side surface may be concave; the second lens has negative optical power, and its object side surface may be convex; the third lens has positive optical power or negative optical power; the fourth lens has positive optical power, and its object side surface may be convex, and the image side surface may be convex; the fifth lens has negative optical power, and its object side surface may be concave, and the image side surface may be concave.

[0059] In an exemplary embodiment, the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and half of the diagonal length of the effective pixel area on the imaging surface ImgH may satisfy the conditional formula TTL / ImgH≤1.41. More specifically, TTL and ImgH may satisfy 1.28<TTL / ImgH≤1.41. By controlling the ratio of the total optical length and the image height of the optical imaging lens, the structure of the optical imaging lens can be made compact.

[0060] In an exemplary embodiment, the effective focal length f5 of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens may satisfy the conditional formula R10 / f5>-0.6. More specifically, f5 and R10 may satisfy -0.58<R10 / f5<-0.52. By controlling the ratio of the curvature radius of the image side surface of the fifth lens to the effective focal length of the fifth lens, the astigmatism of the optical imaging lens can be effectively controlled, thereby improving the imaging quality of the off-axis field of view.

[0061] In an exemplary embodiment, the spacing distance T45 between the fourth lens and the fifth lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis may satisfy the conditional formula: 0.3<T45 / CT5<0.8. More specifically, T45 and CT5 may satisfy 0.49<T45 / CT5<0.56. By controlling the ratio of the air spacing in the object side direction of the fifth lens to its center thickness, it is beneficial to control the field curvature contribution and effectively improve the resolution of the optical imaging lens.

[0062] For example, the optical imaging lens of the present application may satisfy the conditions TTL / ImgH≤1.41, -0.58<R10 / f5<-0.52, and 0.3<T45 / CT5<0.8, which is beneficial for making the optical imaging lens ultra-thin and having good imaging quality.

[0063] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0<SAG41 / SAG42≤0.47, wherein SAG41 is the on-axis distance from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth 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. More specifically, SAG41 and SAG42 may satisfy 0.30<SAG41 / SAG42≤0.47. By controlling the ratio of the sagittal height of the object side surface to the image side surface of the fourth lens, it is beneficial to control the shape of the fourth lens, improve the processability of the fourth lens, and help improve the resolution of the optical imaging lens.

[0064] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 3.8<TTL / ∑AT≤4.6, wherein TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and ∑AT is the sum of the spacing distances on the optical axis from the first lens to any two adjacent lenses with optical focal lengths in the lens closest to the imaging surface. Exemplarily, ∑AT=T12+T23+T34+T45. More specifically, TTL and ∑AT may satisfy 3.92<TTL / ∑AT≤4.50. By controlling the ratio of the total optical length of the optical imaging lens to the sum of the spacing distances between the lenses, it is beneficial to control the total length of the optical imaging lens, making its structure compact, and is beneficial to better control the center thickness of each lens and the spacing distance between each lens, thereby better controlling the field curvature and making the optical imaging lens have better imaging quality.

[0065] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0<(T12+T45) / ∑AT<0.5, wherein ∑AT is the sum of the distances between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging plane on the optical axis, T12 is the distance between the first lens and the second lens on the optical axis, and T45 is the distance between the fourth lens and the fifth lens on the optical axis. Exemplarily, ∑AT is the sum of the distances between any two adjacent lenses with optical power from the first lens to the fifth lens on the optical axis. More specifically, ∑AT, T12, and T45 may satisfy 0.20<(T12+T45) / ∑AT<0.26. By matching the spacing distance between the first lens and the second lens, the spacing distance between the fourth lens and the fifth lens, and the sum of the spacing distances of adjacent lenses, it is beneficial to match the air spacing located toward the object side with the air spacing located toward the image side, which is beneficial to ensuring the processing characteristics of each lens and the assembly characteristics of the optical imaging lens, and is also beneficial to effectively adjusting the field curvature of the optical imaging lens, reducing the sensitivity of the optical imaging lens, and thereby obtaining better imaging quality.

[0066] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 1<f12 / f<1.6, wherein f12 is the combined focal length of the first lens and the second lens, and f is the total effective focal length of the optical imaging lens. More specifically, f12 and f may satisfy 1.27<f12 / f<1.47. By controlling the ratio of the combined focal length of the first lens and the second lens to the total effective focal length, it is beneficial to control the spherical aberration contribution of the first lens and the second lens, so that the on-axis field of view of the optical imaging lens has good imaging quality.

[0067] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.6<f1 / f<1.2, wherein f1 is the effective focal length of the first lens, and f is the total effective focal length of the optical imaging lens. More specifically, f1 and f may satisfy 0.85<f1 / f<0.98. By controlling the ratio of the effective focal length of the first lens to the total effective focal length, it is beneficial to reduce the contribution of the third-order spherical aberration and the fifth-order spherical aberration of the first lens, and it is beneficial to balance the spherical aberration generated by the first lens with the spherical aberration generated by the lens on its image side, thereby making the on-axis aberration smaller and making the optical imaging system have good imaging quality.

[0068] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula -1.3<(R3+R4) / f2<-0.3, where f2 is the effective focal length of the second lens, R3 is the radius of curvature of the object side surface of the second lens, and R4 is the radius of curvature of the image side surface of the third lens. More specifically, f2, R3, and R4 may satisfy -1.05<(R3+R4) / f2<-0.55. By matching the radius of curvature of the object side surface of the second lens, the effective focal length of the second lens, and the radius of curvature of the image side surface of the second lens, it is beneficial to control the high-order spherical aberration contributed by the second lens to the optical imaging lens, so that the optical imaging lens has good imaging quality.

[0069] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.3<f4 / f<0.9, where f4 is the effective focal length of the fourth lens, and f is the total effective focal length of the optical imaging lens. More specifically, f4 and f may satisfy 0.52<f4 / f<0.65. By controlling the ratio of the effective focal length of the fourth lens to the total effective focal length, it is beneficial to control the spherical aberration contribution of the fourth lens, which is beneficial to making the optical imaging lens have a smaller spherical aberration, thereby making the on-axis field of view have good imaging quality.

[0070] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0<|R1 / R2|<0.4, where R1 is the radius of curvature of the object side surface of the first lens, and R2 is the radius of curvature of the image side surface of the first lens. More specifically, R1 and R2 may satisfy 0.17<|R1 / R2|<0.36. By controlling the ratio of the radius of curvature of the two sides of the first lens, the shape of the first lens can be controlled, and the contribution of the first lens to the spherical aberration of the optical imaging lens can be effectively controlled, thereby enabling the optical imaging lens to have better resolution.

[0071] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.6<(R7+R8) / (R7-R8)<1.2, where R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens. More specifically, R7 and R8 may satisfy 0.85<(R7+R8) / (R7-R8)<1.00. By controlling the radius of curvature of the two side surfaces of the fourth lens, the refraction angle of the light beam in the optical imaging lens at the fourth lens can be effectively controlled, so that the optical imaging lens has good processing characteristics.

[0072] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.2<CT3 / CT4<1, where CT3 is the center thickness of the third lens on the optical axis, and the center thickness CT3 and the fourth lens on the optical axis CT4 may satisfy 0.4<CT3 / CT4<0.88. By controlling the ratio of the center thickness of the third lens and the fourth lens, it is beneficial to control the contribution of the third lens and the fourth lens to the field curvature, and thus it is beneficial to control the distortion of the optical imaging lens. In addition, the optical imaging lens of the present application is easy to be installed in electronic products, reducing or avoiding later software debugging.

[0073] The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the five lenses described above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, etc., the sensitivity of the imaging lens can be effectively reduced, the processability of the imaging lens can be improved, the volume of the imaging lens can be reduced, and the optical imaging lens can have a smaller head, making the optical imaging lens more conducive to production and processing and suitable for mobile phones that are expected to have a large screen ratio. At the same time, the optical imaging lens of the present application also has optical performance with high imaging quality.

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

[0075] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

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

[0077] Example 1

[0078] The following reference Figures 2 to 3D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown.

[0079] like Figure 1 As shown, 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 and a filter E6.

[0080] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13, and the light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13. Table 1 shows the basic parameter table of the optical imaging lens of Example 1, in which the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0081]

[0082]

[0083] Table 1

[0084] In Example 1, the total effective focal length f of the optical imaging lens is 3.45 mm, the aperture number Fno is 2.08, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.28 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.04 mm, and the half maximum field of view angle Semi-FOV is 40.79°.

[0085] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fifth lens E5 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 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, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0088] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.4099E-02 2.0187E-01 -1.8409E+00 1.0079E+01 -3.4029E+01 7.1393E+01 -9.0632E+01 6.3742E+01 -1.9096E+01 S2 -1.2416E-01 3.0127E-01 3.2984E-01 -6.5266E+00 3.2548E+01 -9.1689E+01 1.5090E+02 -1.3470E+02 5.0172E+01 S3 -2.1448E-01 5.9131E-01 -1.2450E+00 5.7617E+00 -2.7759E+01 8.3441E+01 -1.4708E+02 1.4050E+02 -5.6502E+01 S4 -1.3671E-01 3.7904E-01 -4.0797E-01 1.4255E+00 -8.2501E+00 2.9806E+01 -6.1011E+01 6.7591E+01 -3.1491E+01 S5 -1.8780E-01 2.8105E-01 -2.7287E+00 1.4800E+01 -5.0392E+01 1.0717E+02 -1.3837E+02 9.9597E+01 -3.0240E+01 S6 -1.4674E-01 6.7366E-02 -5.5745E-01 1.9882E+00 -4.4704E+00 6.3670E+00 -5.5672E+00 2.7387E+00 -5.6564E-01 S7 1.8483E-03 -5.0570E-02 -7.2750E-02 2.0089E-01 -2.2025E-01 1.3463E-01 -4.6022E-02 8.1908E-03 -5.9141E-04 S8 -8.6431E-02 6.1120E-02 -8.5697E-02 1.0091E-01 -4.9264E-02 8.2716E-03 1.0268E-03 -5.1504E-04 4.8034E-05 S9 -3.9294E-01 2.1637E-01 -2.7841E-02 -6.0998E-03 -1.4794E-04 1.2866E-03 -3.7852E-04 4.5273E-05 -2.0390E-06 S10 -2.3152E-01 1.9675E-01 -1.1949E-01 5.0665E-02 -1.4733E-02 2.8113E-03 -3.2996E-04 2.1317E-05 -5.7439E-07

[0089] Table 2

[0090] Figure 3A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figure 3B 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 3C 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 3D The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 3A to FIG. 3D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0091] Example 2

[0092] The following reference Figures 4 to 5DThe optical imaging lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0093] like Figure 4 As shown, 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 and a filter E6.

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

[0095] In Example 2, the total effective focal length f of the optical imaging lens is 3.45 mm, the aperture number Fno is 2.08, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.28 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.04 mm, and the half maximum field of view angle Semi-FOV is 40.80°.

[0096] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0097]

[0098] Table 3

[0099] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.3635E-02 1.9052E-01 -1.7850E+00 1.0111E+01 -3.5083E+01 7.5447E+01 -9.7975E+01 7.0386E+01 -2.1499E+01 S2 -1.4425E-01 2.7704E-01 2.5060E-01 -4.8889E+00 2.3945E+01 -6.6710E+01 1.0859E+02 -9.5799E+01 3.5211E+01 S3 -2.0045E-01 5.3029E-01 -1.6283E+00 1.0230E+01 -4.9234E+01 1.4349E+02 -2.4786E+02 2.3429E+02 -9.3628E+01 S4 -1.3936E-01 4.1671E-01 -1.0853E+00 6.7185E+00 -3.1405E+01 9.1734E+01 -1.6212E+02 1.5978E+02 -6.7444E+01 S5 -1.6476E-01 2.1532E-01 -1.7049E+00 8.0556E+00 -2.4173E+01 4.5495E+01 -5.2178E+01 3.3665E+01 -9.3031E+00 S6 -1.4441E-01 6.6283E-02 -5.5053E-01 1.9203E+00 -4.1922E+00 5.7269E+00 -4.7632E+00 2.2150E+00 -4.3375E-01 S7 2.2714E-03 -5.8938E-02 -7.9895E-02 2.5759E-01 -3.1226E-01 2.0568E-01 -7.4864E-02 1.4131E-02 -1.0821E-03 S8 -1.0503E-01 9.5818E-02 -1.4433E-01 1.7571E-01 -1.0469E-01 3.1934E-02 -4.7871E-03 2.5319E-04 5.5380E-06 S9 -3.8691E-01 2.0685E-01 -2.2238E-02 -6.2007E-03 -1.4426E-03 1.9194E-03 -5.1958E-04 6.1003E-05 -2.7502E-06 S10 -2.2786E-01 1.9180E-01 -1.1545E-01 4.8395E-02 -1.3869E-02 2.5968E-03 -2.9676E-04 1.8423E-05 -4.6572E-07

[0100] Table 4

[0101] Figure 5A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figure 5BThe astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 5C 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 5D The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 5A to FIG. 5D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0102] Example 3

[0103] The following reference Figures 6 to 7D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 6 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0104] like Figure 6 As shown, 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 and a filter E6.

[0105] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13, and the light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0106] In Example 3, the total effective focal length f of the optical imaging lens is 3.44 mm, the aperture number Fno is 2.08, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.28 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.04 mm, and the half maximum field of view angle Semi-FOV is 40.84°.

[0107] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 6 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0108]

[0109] Table 5

[0110]

[0111]

[0112] Table 6

[0113] Fig. 7A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figure 7B 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 7C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.7D The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 7A to FIG. 7D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0114] Example 4

[0115] The following reference Figures 8 to 9D An optical imaging lens according to Embodiment 4 of the present application is described. Figure 8 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0116] like Figure 8 As shown, 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 and a filter E6.

[0117] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13, and the light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0118] In Example 4, the total effective focal length f of the optical imaging lens is 3.44 mm, the aperture number Fno is 2.08, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.28 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.04 mm, and the half maximum field of view angle Semi-FOV is 40.85°.

[0119] Table 7 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 8 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0120]

[0121]

[0122] Table 7

[0123] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.2649E-02 1.8766E-01 -1.7851E+00 1.0261E+01 -3.6182E+01 7.9090E+01 -1.0443E+02 7.6288E+01 -2.3713E+01 S2 -1.1029E-01 2.3908E-01 2.0732E-01 -3.5732E+00 1.5965E+01 -4.2239E+01 6.6556E+01 -5.7490E+01 2.0750E+01 S3 -1.9468E-01 4.9000E-01 -1.4776E+00 1.0876E+01 -5.7897E+01 1.8003E+02 -3.2636E+02 3.2051E+02 -1.3204E+02 S4 -1.1681E-01 3.9402E-01 -1.1867E+00 7.8378E+00 -3.6356E+01 1.0502E+02 -1.8400E+02 1.8031E+02 -7.5842E+01 S5 -1.4974E-01 1.3701E-01 -9.4762E-01 4.4787E+00 -1.3539E+01 2.5185E+01 -2.7890E+01 1.6921E+01 -4.2960E+00 S6 -1.4859E-01 -4.7960E-03 3.6843E-02 -1.6653E-01 2.5909E-01 -1.9908E-01 6.5599E-02 9.8726E-03 -8.1980E-03 S7 -1.8971E-03 -8.8788E-02 3.0580E-02 8.3638E-02 -1.6587E-01 1.3616E-01 -5.6603E-02 1.1757E-02 -9.7492E-04 S8 -1.1784E-01 1.1599E-01 -1.5687E-01 1.9271E-01 -1.2671E-01 4.6131E-02 -9.4960E-03 1.0390E-03 -4.7075E-05 S9 -3.7208E-01 1.7868E-01 1.5157E-02 -3.7827E-02 1.4356E-02 -2.7760E-03 3.0182E-04 -1.7412E-05 4.1027E-07 S10 -2.2250E-01 1.8536E-01 -1.1184E-01 4.7469E-02 -1.3899E-02 2.6848E-03 -3.2017E-04 2.1083E-05 -5.8139E-07

[0124] Table 8

[0125] Fig.9A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Fig. 9B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 9C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.9D 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. 9A to 9D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0126] Example 5

[0127] The following reference Figures 10 to 11D An optical imaging lens according to Embodiment 5 of the present application is described. Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0128] like Fig.10 As shown, 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 and a filter E6.

[0129] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. 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 positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13, and the light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0130] In Example 5, the total effective focal length f of the optical imaging lens is 3.44 mm, the aperture number Fno is 2.08, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.28 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.04 mm, and the half maximum field of view angle Semi-FOV is 40.84°.

[0131] Table 9 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 10 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0132]

[0133]

[0134] Table 9

[0135] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.2117E-02 1.7644E-01 -1.6305E+00 9.1507E+00 -3.1646E+01 6.8012E+01 -8.8456E+01 6.3746E+01 -1.9582E+01 S2 -1.0834E-01 2.2008E-01 4.4909E-01 -5.4571E+00 2.4633E+01 -6.6573E+01 1.0738E+02 -9.5058E+01 3.5324E+01 S3 -1.9709E-01 4.7541E-01 -1.0237E+00 7.0475E+00 -3.9657E+01 1.2722E+02 -2.3460E+02 2.3262E+02 -9.6386E+01 S4 -1.1486E-01 3.8262E-01 -1.0057E+00 6.6654E+00 -3.2009E+01 9.5242E+01 -1.7075E+02 1.7042E+02 -7.2733E+01 S5 -1.5056E-01 1.3017E-01 -9.1167E-01 4.3497E+00 -1.3343E+01 2.5211E+01 -2.8342E+01 1.7430E+01 -4.4691E+00 S6 -1.4708E-01 -8.3595E-03 6.4126E-02 -2.5845E-01 4.3133E-01 -3.8709E-01 1.8585E-01 -3.2237E-02 -1.9754E-03 S7 7.8720E-03 -1.7770E-01 3.2425E-01 -4.0644E-01 3.0341E-01 -1.3249E-01 3.4147E-02 -4.9195E-03 3.1007E-04 S8 -1.2166E-01 1.2175E-01 -1.5134E-01 1.7696E-01 -1.1353E-01 4.0449E-02 -8.1297E-03 8.6455E-04 -3.7833E-05 S9 -3.8625E-01 2.1270E-01 -1.9870E-02 -1.7823E-02 7.3722E-03 -1.2430E-03 9.4746E-05 -1.6540E-06 -1.0749E-07 S10 -2.2237E-01 1.8714E-01 -1.1376E-01 4.8466E-02 -1.4217E-02 2.7493E-03 -3.2833E-04 2.1676E-05 -6.0063E-07

[0136] Table 10

[0137] Fig.11A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Fig. 11B 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. 11C 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.11D The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 11A to FIG. 11DIt can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0138] Example 6

[0139] The following reference Figures 12 to 13D An optical imaging lens according to Embodiment 6 of the present application is described. Fig.12 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0140] like Fig.12 As shown, 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 and a filter E6.

[0141] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13, and the light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0142] In Example 6, the total effective focal length f of the optical imaging lens is 3.40 mm, the aperture number Fno is 2.07, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.14 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.09 mm, and the half maximum field of view angle Semi-FOV is 41.83°.

[0143] Table 11 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 12 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 6, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0144]

[0145] Table 11

[0146] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.3924E-02 1.5248E-01 -1.3047E+00 6.9326E+00 -2.2721E+01 4.6118E+01 -5.6450E+01 3.8230E+01 -1.1064E+01 S2 -1.2209E-01 2.3775E-01 9.7630E-01 -8.2965E+00 3.2482E+01 -7.9662E+01 1.2034E+02 -1.0198E+02 3.6773E+01 S3 -2.6781E-01 1.0407E+00 -6.1720E+00 4.7122E+01 -2.3454E+02 7.0305E+02 -1.2458E+03 1.2035E+03 -4.8899E+02 S4 -1.4703E-01 5.0575E-01 -1.0274E+00 4.1307E+00 -1.0403E+01 2.1876E+00 4.8997E+01 -9.8765E+01 6.1032E+01 S5 -2.0356E-01 4.5893E-01 -5.0023E+00 3.1790E+01 -1.2259E+02 2.9102E+02 -4.1495E+02 3.2618E+02 -1.0822E+02 S6 -1.5110E-01 -1.0085E-01 5.7502E-01 -2.2709E+00 5.5317E+00 -8.2997E+00 7.5228E+00 -3.7326E+00 7.8559E-01 S7 2.5182E-02 -1.5518E-01 1.5130E-01 -8.8109E-02 5.2970E-03 2.8410E-02 -1.6568E-02 3.7739E-03 -3.1647E-04 S8 -6.4795E-02 -3.1337E-02 6.4225E-02 -2.8076E-02 1.4742E-02 -1.0172E-02 3.8895E-03 -6.9820E-04 4.7607E-05 S9 -3.8735E-01 1.5968E-01 7.5006E-02 -9.1823E-02 4.0024E-02 -9.9854E-03 1.5038E-03 -1.2746E-04 4.6737E-06 S10 -2.3515E-01 1.9695E-01 -1.1711E-01 4.8443E-02 -1.3686E-02 2.5002E-03 -2.7271E-04 1.5509E-05 -3.3033E-07

[0147] Table 12

[0148] Fig.13A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Fig. 13B 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. 13C 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.13D The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 13A to FIG. 13D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0149] Example 7

[0150] The following reference Figures 14 to 15D An optical imaging lens according to Embodiment 7 of the present application is described. Fig.14 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0151] like Fig.14 As shown, 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 and a filter E6.

[0152] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13, and the light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0153] In Example 7, the total effective focal length f of the optical imaging lens is 3.44 mm, the aperture number Fno is 2.08, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.26 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.11 mm, and the half maximum field of view angle Semi-FOV is 41.67°.

[0154] Table 13 shows the basic parameters of the optical imaging lens of Example 7, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 14 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 7, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0155]

[0156] Table 13

[0157]

[0158]

[0159] Table 14

[0160] Fig.15A The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Fig. 15B The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 15C The distortion curve of the optical imaging lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.15D The magnification chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 15A to FIG. 15D It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0161] Example 8

[0162] The following reference Figures 16 to 17D An optical imaging lens according to Example 8 of the present application is described. Fig.16 A schematic structural diagram of an optical imaging lens according to Example 8 of the present application is shown.

[0163] like Fig.16 As shown, 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 and a filter E6.

[0164] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The optical imaging lens has an imaging surface S13, and the light from the object passes through each surface S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0165] In Example 8, the total effective focal length f of the optical imaging lens is 3.39 mm, the aperture number Fno is 2.08, the axial distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S13 is 4.10 mm, the half diagonal length of the effective pixel area on the imaging surface S13 ImgH is 3.15 mm, and the half of the maximum field of view angle Semi-FOV is 42.38°. Table 15 shows the basic parameter table of the optical imaging lens of Example 8, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 16 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 8, wherein each aspherical surface shape can be defined by the formula (1) given in the above Example 1.

[0166]

[0167] Table 15

[0168]

[0169]

[0170] Table 16

[0171] Fig.17A The axial chromatic aberration curve of the optical imaging lens of Example 8 is shown, which indicates the deviation of the convergent focus of light of different wavelengths after passing through the lens. Fig. 17B The astigmatism curve of the optical imaging lens of Example 8 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 17C The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.17D The magnification chromatic aberration curve of the optical imaging lens of Example 8 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 17A to FIG. 17D It can be seen that the optical imaging lens provided in Example 8 can achieve good imaging quality.

[0172] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0173] Conditional formula\Example 1 2 3 4 5 6 7 8 TTL / ImgH 1.41 1.41 1.41 1.41 1.41 1.34 1.37 1.30 R10 / f5 -0.54 -0.55 -0.54 -0.54 -0.54 -0.55 -0.57 -0.56 T45 / CT5 0.51 0.52 0.52 0.51 0.50 0.51 0.55 0.50 SAG41 / SAG42 0.47 0.46 0.39 0.40 0.40 0.47 0.43 0.31 TTL / ∑AT 3.95 4.05 4.41 4.46 4.48 4.02 4.02 4.02 (T12+T45) / ∑AT 0.23 0.24 0.25 0.25 0.25 0.22 0.24 0.22 f12 / f 1.43 1.46 1.35 1.34 1.33 1.36 1.45 1.29 f1 / f 0.88 0.92 0.92 0.91 0.91 0.92 0.95 0.97 (R3+R4) / f2 -1.02 -0.88 -0.73 -0.74 -0.78 -0.76 -0.79 -0.58 f4 / f 0.62 0.60 0.55 0.56 0.56 0.64 0.59 0.56 |R1 / R2| 0.18 0.23 0.26 0.26 0.25 0.26 0.26 0.34 (R7+R8) / (R7-R8) 0.98 0.98 0.87 0.87 0.87 0.98 0.98 0.91 CT3 / CT4 0.74 0.68 0.75 0.81 0.85 0.64 0.66 0.41

[0174] Table 17

[0175] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging, and the electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (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.

[0176] 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 protection 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 concept of the present application. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

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 positive refractive power, and its object side surface is convex and its image side surface is concave; The second lens has a negative optical power, and its object side surface is convex and its image side surface is concave; a third lens having optical power; a fourth lens element having positive refractive power, whose object-side surface is convex and whose image-side surface is convex; a fifth lens having negative optical power, whose object-side surface is concave and whose image-side surface is concave; The number of lenses having optical power in the optical imaging lens is five; The optical imaging lens satisfies the following relationship: 1.28<TTL / ImgH≤1.41; -0.58<R10 / f5<-0.52; 0.49<T45 / CT5<0.56; Wherein, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, ImgH is half of the diagonal length of the effective pixel area on the imaging surface, f5 is the effective focal length of the fifth lens, R10 is the curvature radius of the image side surface of the fifth lens, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens further comprises a lens barrel, the first lens to the fifth lens are arranged in the lens barrel, and wherein: An outer diameter of the lens barrel at an object side end is smaller than an outer diameter of the lens barrel at an image side end.

3. The optical imaging lens according to claim 2, wherein: The inner wall surface of the lens barrel includes at least two steps, and the inner diameter of the inner wall surface increases from the object side end to the image side end.

4. The optical imaging lens according to claim 1, wherein: The outer surface of the ineffective area of ​​the second lens is a sandblasted layer or a grooved surface.

5. The optical imaging lens according to claim 1, wherein: Adjacent steps have a step difference, and the step corresponding to the fourth lens and the step corresponding to the third lens have the largest step difference; The optical imaging lens comprises at least two spacers arranged between the third lens and the fourth lens, and the two spacers comprise at least one metal spacer.

6. The optical imaging lens according to claim 5, characterized in that: The two spacers include at least one plastic spacer.

7. The optical imaging lens according to claim 1, wherein: The optical imaging lens further includes a pressure ring disposed on the image side of the fifth lens.

8. The optical imaging lens according to claim 1, wherein: An on-axis distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens and an 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 satisfy 0.30<SAG41 / SAG42≤0.

47.

9. The optical imaging lens according to claim 1, wherein: A distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and a sum ΣAT of the spacing distances between any two adjacent lenses with optical power from the first lens to the fifth lens on the optical axis satisfy 3.8<TTL / ΣAT≤4.

6.

10. The optical imaging lens according to claim 1, wherein: The sum of the spacing distances ∑AT between any two adjacent lenses with optical power from the first lens to the fifth lens on the optical axis, the spacing distance T12 between the first lens and the second lens on the optical axis, and the spacing distance T45 between the fourth lens and the fifth lens on the optical axis satisfy 0.20<(T12+T45) / ∑AT<0.

26.

11. The optical imaging lens according to claim 1, wherein: The combined focal length f12 of the first lens and the second lens and the total effective focal length f of the optical imaging lens satisfy 1.27<f12 / f<1.

47.

12. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens satisfy 0.85<f1 / f<0.

98.

13. The optical imaging lens according to claim 1, wherein: The effective focal length f2 of the second lens, the curvature radius R3 of the object-side surface of the second lens, and the curvature radius R4 of the image-side surface of the third lens satisfy -1.05<(R3+R4) / f2<-0.

55.

14. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens satisfy 0.52<f4 / f<0.

65.

15. The optical imaging lens according to claim 1, wherein: A curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens satisfy 0.17<|R1 / R2|<0.

36.

16. The optical imaging lens according to claim 1, wherein: A curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens satisfy 0.85<(R7+R8) / (R7-R8)<1.

00.

17. The optical imaging lens according to any one of claims 1 to 16, characterized in that: A center thickness CT3 of the third lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy 0.4<CT3 / CT4<0.88.

Images