Optical imaging lens

Abstract

The application discloses an optical imaging lens which comprises, in order from the object side to the image side along the optical axis, a first lens with optical power, a second lens, a third lens, a fourth lens and a fifth lens. The first lens has positive optical power, and the object side surface thereof is a convex surface; the second lens has negative optical power; the image side surface of the fourth lens is a convex surface; the fifth lens has negative optical power, the object side surface thereof is a convex surface, and the image side surface thereof is a concave surface; the first lens and the second lens are cemented to form a cemented lens group; any one of the third lens, the fourth lens and the fifth lens has an air gap with the adjacent lens; the optical imaging lens has five lenses with optical power; and the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens satisfy -0.9 < f5 / f < -0.5.

Description

[0001] Divisional application

[0002] This application is a divisional application of Chinese invention patent application filed on February 13, 2019, entitled "Optical Imaging Lens" and with application number 201910112528.0. Technical Field

[0003] This application relates to an optical imaging lens, and more specifically, to an optical imaging lens comprising five lenses. Background Technology

[0004] With the continuous development of optical systems in various fields, people are placing increasingly higher demands on the imaging quality of optical lenses. At the same time, there is also a requirement for lenses mounted on mobile phones and other electronic products to be miniaturized and have low manufacturing costs. Generally speaking, reducing the lens aperture is an effective way to reduce the size of optical lenses; however, the image quality, especially the ability to reproduce details, often deteriorates as the lens aperture decreases. Therefore, how to balance the relationship between small aperture characteristics and high-quality imaging is a problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides an optical imaging lens that can at least solve or partially solve at least one of the above-mentioned disadvantages in the prior art.

[0006] On one hand, this application provides an optical imaging lens comprising, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, each having optical power. The first lens may have positive optical power, and its object side may be convex; the second lens may have negative optical power; the fourth lens may have a convex image side; the fifth lens may have negative optical power, its object side may be convex, and its image side may be concave; the first and second lenses are cemented together to form a cemented lens group; any one of the third, fourth, and fifth lenses has an air gap with its adjacent lens; the optical imaging lens has five lenses with optical power; and the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens satisfy -0.9 < f5 / f < -0.5.

[0007] In one embodiment, the combined focal length f12 of the first lens and the second lens and the center thickness CT1 of the first lens on the optical axis can satisfy 4 < f12 / CT1 < 7.

[0008] In one embodiment, the radius of curvature R1 of the object side of the first lens and the radius of curvature R8 of the image side of the fourth lens can satisfy -1.2 < R1 / R8 < -0.4.

[0009] In one embodiment, the radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the image side of the fifth lens can satisfy 0.3 < (R9-R10) / (R9+R10) < 0.8.

[0010] In one implementation, the field of view (FOV) of the optical imaging lens can satisfy 69° < FOV < 81°.

[0011] In one embodiment, the maximum effective half-aperture DT11 of the object side of the first lens, the maximum effective half-aperture DT12 of the image side of the first lens, the maximum effective half-aperture DT21 of the object side of the second lens, the maximum effective half-aperture DT22 of the image side of the second lens, and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy 1 < (DT11 + DT12 + DT21 + DT22) / ImgH < 1.3.

[0012] In one embodiment, the maximum effective half-aperture DT11 of the object side of the first lens, the maximum effective half-aperture DT12 of the image side of the first lens, the maximum effective half-aperture DT21 of the object side of the second lens, the maximum effective half-aperture DT22 of the image side of the second lens, and the distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis can satisfy 0.7 < (DT11 + DT12 + DT21 + DT22) / TTL < 0.9.

[0013] In one embodiment, the maximum effective half-aperture DT11 of the object side of the first lens and the maximum effective half-aperture DT22 of the image side of the second lens satisfy 0.5mm≤(DT11+DT22) / 2≤0.9mm.

[0014] In one embodiment, the air gap T23 between the second and third lenses on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, the air gap T45 between the fourth and fifth lenses on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis can satisfy 0.4 < (T23 + T34 + T45) / (CT3 + CT4) < 1.2.

[0015] In one embodiment, the optical imaging lens further includes an aperture stop, and the distance SL between the aperture stop and the imaging surface of the optical imaging lens on the optical axis and the sum of the center thicknesses ∑CT of the first lens to the fifth lens on the optical axis can satisfy 0.4 < ∑CT / SL < 0.8.

[0016] In one 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 the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy 1.3≤TTL / ImgH≤1.75.

[0017] In one embodiment, the distance SAG41 from the intersection of the fourth lens object side and the optical axis to the effective half-aperture vertex of the fourth lens object side on the optical axis, the distance SAG42 from the intersection of the fourth lens image side and the optical axis to the effective half-aperture vertex of the fourth lens image side on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis can satisfy 0.6 < |SAG41 + SAG42| / CT4 < 1.5.

[0018] In one embodiment, the distance SAG52 from the intersection of the image side of the fifth lens and the optical axis to the effective half-aperture vertex of the image side of the fifth lens on the optical axis and the distance SAG51 from the intersection of the object side of the fifth lens and the optical axis to the effective half-aperture vertex of the object side of the fifth lens on the optical axis can satisfy 0.1 < |SAG52 / SAG51| < 1.

[0019] This application employs five lenses. By appropriately introducing cemented lenses and rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the aforementioned optical imaging lens achieves at least one beneficial effect such as small aperture, high imaging quality, and miniaturization. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown;

[0022] Figures 2A to 2D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 1 are shown respectively.

[0023] Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0024] Figures 4A to 4D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 2 are shown respectively.

[0025] Figure 5 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown;

[0026] Figures 6A to 6DThe on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 3 are shown respectively.

[0027] Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0028] Figures 8A to 8D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 4 are shown respectively.

[0029] Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0030] Figures 10A to 10D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 5 are shown respectively.

[0031] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0032] Figures 12A to 12D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 6 are shown respectively.

[0033] Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0034] Figures 14A to 14D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 7 are shown respectively.

[0035] Figure 15 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown;

[0036] Figures 16A to 16D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens in Example 8 are shown respectively. Detailed Implementation

[0037] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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.

[0038] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0039] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0040] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness 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 subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0041] It should also be understood that the terms "comprising," "including," "having," "containing," 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. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0042] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so specified herein.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] The features, principles and other aspects of this application are described in detail below.

[0045] An optical imaging lens according to an exemplary embodiment of this application may include, for example, five lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged sequentially along the optical axis from the object side to the image side.

[0046] In an exemplary embodiment, the first lens may have positive optical power and its object-side surface may be convex; the second lens may have negative optical power; the third lens may have positive or negative optical power; the fourth lens may have positive or negative optical power and its image-side surface may be convex; the fifth lens may have negative optical power, its object-side surface may be convex, and its image-side surface may be concave. By appropriately allocating the optical power and surface shape of the fifth lens, the aberrations of the system can be ensured to be within a reasonable range.

[0047] In optical imaging lenses, a first lens and a second lens can be cemented together to form a cemented lens group; the third, fourth, and fifth lenses can be independent of their adjacent lenses and have air gaps between them. Introducing cemented lenses not only helps eliminate the chromatic aberration of the individual lenses within the cemented lens group but also leaves some chromatic aberration to balance the system's overall chromatic aberration, thereby enhancing the lens's ability to balance chromatic aberration and improving imaging resolution. Furthermore, the cementation of lenses eliminates the air gaps between two lenses, resulting in a compact and simple overall lens structure, which helps shorten the overall optical length of the lens and meets miniaturization requirements. In addition, the cementation of lenses reduces the tolerance sensitivity issues such as tilting / eccentricity that occur during lens assembly, improving the lens's mass production capability. Simultaneously, cemented lenses also have the advantages of low light energy loss and high lateral and axial resolution.

[0048] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition (DT11+DT22) / 2≤0.9mm, where DT11 is the maximum effective half-aperture of the object-side surface of the first lens, and DT22 is the maximum effective half-aperture of the image-side surface of the second lens. More specifically, DT11 and DT22 can further satisfy 0.5mm≤(DT11+DT22) / 2≤0.9mm, for example, 0.80mm≤(DT11+DT22) / 2≤0.90mm. Reasonably controlling the maximum effective half-aperture of the object-side surface of the first lens and the maximum effective half-aperture of the image-side surface of the second lens is beneficial for achieving system miniaturization.

[0049] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 4 < f12 / CT1 < 7, where f12 is the combined focal length of the first lens and the second lens, and CT1 is the center thickness of the first lens on the optical axis. More specifically, f12 and CT1 can further satisfy 4.66 ≤ f12 / CT1 ≤ 6.39. Satisfying the condition 4 < f12 / CT1 < 7 can effectively reduce the chromatic aberration of the optical imaging lens and avoid excessive spherical aberration and coma in the system.

[0050] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition -0.9 < f5 / f < -0.5, where f5 is the effective focal length of the fifth lens and f is the total effective focal length of the optical imaging lens. More specifically, f5 and f can further satisfy -0.87 ≤ f5 / f ≤ -0.68. Satisfying the condition -0.9 < f5 / f < -0.5 can avoid excessive light deflection, while adjusting the light focusing position, improving the system's ability to converge light, and shortening the total length of the optical imaging lens.

[0051] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition -1.2 < R1 / R8 < -0.4, where R1 is the radius of curvature of the object-side surface of the first lens and R8 is the radius of curvature of the image-side surface of the fourth lens. More specifically, R1 and R8 can further satisfy -1.19 ≤ R1 / R8 ≤ -0.50. Reasonably controlling the radius of curvature of the object-side surface of the first lens and the radius of curvature of the image-side surface of the fourth lens can effectively reduce the manufacturing difficulty, while also improving the chromatic aberration balance and distortion balance capabilities of the optical imaging lens.

[0052] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 0.3 < (R9 - R10) / (R9 + R10) < 0.8, where R9 is the radius of curvature of the object-side surface of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. More specifically, R9 and R10 can further satisfy 0.47 ≤ (R9 - R10) / (R9 + R10) ≤ 0.66. Reasonably controlling the radii of curvature of the object-side and image-side surfaces of the fifth lens can effectively prevent the fifth lens from being excessively curved, reduce manufacturing difficulty, and also reduce astigmatism and coma between the fifth lens and the front lens, thereby improving the imaging quality of the system.

[0053] In an exemplary embodiment, the optical imaging lens of this application satisfies the condition 69° < FOV < 81°, where FOV is the full field of view of the optical imaging lens. More specifically, the FOV can further satisfy 69.9° ≤ FOV ≤ 80.8°. Controlling the full field of view of the optical imaging lens within a reasonable range allows the lens to meet the characteristics of a small size while possessing good aberration balance capabilities, and allows for reasonable adjustment of the principal ray deflection angle, improving the matching degree with the chip.

[0054] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 0.4 < (T23 + T34 + T45) / (CT3 + CT4) < 1.2, where T23 is the air gap between the second and third lenses on the optical axis, T34 is the air gap between the third and fourth lenses on the optical axis, T45 is the air gap between the fourth and fifth lenses on the optical axis, CT3 is the center thickness of the third lens on the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis. More specifically, T23, T34, T45, CT3, and CT4 can further satisfy 0.43 ≤ (T23 + T34 + T45) / (CT3 + CT4) ≤ 1.16. Reasonably allocating the air gaps between the lenses and their center thicknesses on the optical axis can reduce the difficulty of lens processing and assembly, while also ensuring sufficient spacing between the lenses, thereby improving the optical imaging lens's ability to correct astigmatism and field curvature.

[0055] In an exemplary embodiment, the optical imaging lens may further include an aperture stop to improve the image quality of the lens. Optionally, the aperture stop may be disposed between the object side and the first lens.

[0056] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 0.4 < ∑CT / SL < 0.8, where ∑CT is the sum of the center thicknesses of the first to fifth lenses on the optical axis, and SL is the distance from the aperture stop to the imaging surface of the optical imaging lens on the optical axis. More specifically, ∑CT and SL can further satisfy 0.57 ≤ ∑CT / SL ≤ 0.72. Satisfying the condition 0.4 < ∑CT / SL < 0.8 can better balance system chromatic aberration, control lens distortion, and also facilitate adjustment of the overall system length and control of lens size.

[0057] In an exemplary embodiment, the optical imaging lens of this application satisfies the condition 1 < (DT11 + DT12 + DT21 + DT22) / ImgH < 1.3, where DT11 is the maximum effective half-aperture of the object-side surface of the first lens, DT12 is the maximum effective half-aperture of the image-side surface of the first lens, DT21 is the maximum effective half-aperture of the object-side surface of the second lens, DT22 is the maximum effective half-aperture of the image-side surface of the second lens, and ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens. More specifically, DT11, DT12, DT21, DT22, and ImgH can further satisfy 1.09 ≤ (DT11 + DT12 + DT21 + DT22) / ImgH ≤ 1.26. By reasonably adjusting the relative sizes of DT11, DT12, DT21, DT22, and ImgH, the overall size of the optical imaging lens can be effectively reduced, which is beneficial to the miniaturization of the system and thus better meets the miniaturization requirements of an increasing number of portable electronic products on the market.

[0058] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 0.7 < (DT11 + DT12 + DT21 + DT22) / TTL < 0.9, where DT11 is the maximum effective half-aperture of the object-side surface of the first lens, DT12 is the maximum effective half-aperture of the image-side surface of the first lens, DT21 is the maximum effective half-aperture of the object-side surface of the second lens, DT22 is the maximum effective half-aperture of the image-side surface of the second lens, and TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging plane of the optical imaging lens. More specifically, DT11, DT12, DT21, DT22, and TTL can further satisfy 0.72 ≤ (DT11 + DT12 + DT21 + DT22) / TTL ≤ 0.80. Reasonably controlling the relationship between DT11, DT12, DT21, DT22, and TTL is beneficial for reducing system size, lowering manufacturing difficulty and cost, and effectively improving off-axis aberrations by controlling the maximum effective half-aperture of the lens.

[0059] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition TTL / ImgH≤1.75, where TTL is the distance on the optical axis from the object-side surface of the first lens to the imaging surface of the optical imaging lens, and ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. More specifically, TTL and ImgH can further satisfy 1.3≤TTL / ImgH≤1.75, for example 1.41≤TTL / ImgH≤1.71. Ensuring that the total length and image height of the system are within a reasonable range can effectively avoid the image height being too small and also facilitates system miniaturization.

[0060] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 0.6 < |SAG41 + SAG42| / CT4 < 1.5, where SAG41 is the distance on the optical axis from the intersection of the object side of the fourth lens and the optical axis to the vertex of the effective half-aperture of the object side of the fourth lens, SAG42 is the distance on the optical axis from the intersection of the image side of the fourth lens and the optical axis to the vertex of the effective half-aperture of the image side of the fourth lens, and CT4 is the center thickness of the fourth lens on the optical axis. More specifically, SAG41, SAG42, and CT4 can further satisfy 0.66 ≤ |SAG41 + SAG42| / CT4 ≤ 1.40. By reasonably controlling SAG41, SAG42, and CT4, thereby adjusting the principal ray angle of the optical imaging lens, the relative brightness of the optical imaging lens can be effectively improved, and the image surface sharpness can be enhanced.

[0061] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 0.1 < |SAG52 / SAG51| < 1, where SAG52 is the distance on the optical axis from the intersection of the image-side surface of the fifth lens and the optical axis to the vertex of the effective half-aperture of the image-side surface of the fifth lens, and SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective half-aperture of the object-side surface of the fifth lens. More specifically, SAG52 and SAG51 can further satisfy 0.15 ≤ |SAG52 / SAG51| ≤ 0.99. Reasonably controlling SAG52 and SAG51 can improve the manufacturability of the fifth lens, while also improving the imaging quality and sensitivity of the lens.

[0062] Optionally, the aforementioned optical imaging lens may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0063] The optical imaging lens according to the above embodiments of this application can employ multiple lenses, such as the five lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between each lens, the size of the lens can be effectively reduced, the sensitivity of the lens can be decreased, and the manufacturability of the lens can be improved, making the optical imaging lens more conducive to manufacturing and suitable for portable electronic products. Simultaneously, the optical imaging lens configured as described above can achieve beneficial effects such as small aperture, high image quality, and miniaturization.

[0064] In embodiments of this 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 and image-side surfaces of each of the first, second, third, fourth, and fifth lenses is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, both the object-side and image-side surfaces of each of the first, second, third, fourth, and fifth lenses are aspherical mirror surfaces.

[0065] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. 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 desired, the optical imaging lens may also include other numbers of lenses.

[0066] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical imaging lens applicable to the above-described embodiments.

[0067] Example 1

[0068] The following is for reference Figures 1 to 2D Describes an optical imaging lens according to Embodiment 1 of this application. Figure 1 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown.

[0069] like Figure 1 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S13.

[0070] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and is finally imaged on the imaging surface S13.

[0071] In this embodiment, the image-side surface S2 of the first lens E1 is cemented with the object-side surface S3 of the second lens E2 to form a cemented lens group; any one of the third lens E3, the fourth lens E4 and the fifth lens E5 is independent of its adjacent lens and has an air gap.

[0072] Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical imaging lens of Example 1, wherein the units for radius of curvature and thickness are millimeters (mm).

[0073]

[0074] Table 1

[0075] As shown in Table 1, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. In this embodiment, the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0076]

[0077] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient (given in Table 1); Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10 that can be used for each aspherical mirror S1-S10 in Example 1. 10 A 12 A 14 A 16 A 18 and A 20 .

[0078]

[0079]

[0080] Table 2

[0081] Table 3 gives the effective focal lengths f1 to f5 of each lens in the optical imaging lens of Example 1, the total effective focal length f, the total optical length TTL (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13), and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0082] f1(mm) 2.66 f5 (mm) -2.84 f2 (mm) -5.48 f(mm) 3.25 f3 (mm) -32.91 TTL(mm) 4.06 f4 (mm) 3.14 ImgH(mm) 2.81

[0083] Table 3

[0084] The optical imaging lens in Example 1 satisfies the following relationship:

[0085] (DT11+DT22) / 2=0.82mm, where DT11 is the maximum effective half-aperture of the object side surface S1 of the first lens E1, and DT22 is the maximum effective half-aperture of the image side surface S4 of the second lens E2.

[0086] f12 / CT1 = 6.39, where f12 is the combined focal length of the first lens E1 and the second lens E2, and CT1 is the center thickness of the first lens E1 on the optical axis.

[0087] f5 / f = -0.87, where f5 is the effective focal length of the fifth lens E5, and f is the total effective focal length of the optical imaging lens;

[0088] R1 / R8 = -0.71, where R1 is the radius of curvature of the object side surface S1 of the first lens E1, and R8 is the radius of curvature of the image side surface S8 of the fourth lens E4.

[0089] (R9-R10) / (R9+R10)=0.49, where R9 is the radius of curvature of the object side surface S9 of the fifth lens E5, and R10 is the radius of curvature of the image side surface S10 of the fifth lens E5.

[0090] FOV = 80.6°, where FOV is the full field of view of the optical imaging lens;

[0091] (T23+T34+T45) / (CT3+CT4)=1.06, where T23 is the air gap between the second lens E2 and the third lens E3 on the optical axis, T34 is the air gap between the third lens E3 and the fourth lens E4 on the optical axis, T45 is the air gap between the fourth lens E4 and the fifth lens E5 on the optical axis, CT3 is the center thickness of the third lens E3 on the optical axis, and CT4 is the center thickness of the fourth lens E4 on the optical axis.

[0092] ∑CT / SL=0.58, where ∑CT is the sum of the center thicknesses of the first lens E1 to the fifth lens E5 on the optical axis, and SL is the distance on the optical axis from the aperture STO to the imaging surface S13 of the optical imaging lens.

[0093] (DT11+DT12+DT21+DT22) / ImgH=1.16, where DT11 is the maximum effective half-aperture of the object side surface S1 of the first lens E1, DT12 is the maximum effective half-aperture of the image side surface S2 of the first lens E1, DT21 is the maximum effective half-aperture of the object side surface S3 of the second lens E2, DT22 is the maximum effective half-aperture of the image side surface S4 of the second lens E2, and ImgH is half the diagonal length of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0094] (DT11+DT12+DT21+DT22) / TTL=0.80, where DT11 is the maximum effective half-aperture of the object side surface S1 of the first lens E1, DT12 is the maximum effective half-aperture of the image side surface S2 of the first lens E1, DT21 is the maximum effective half-aperture of the object side surface S3 of the second lens E2, DT22 is the maximum effective half-aperture of the image side surface S4 of the second lens E2, and TTL is the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens.

[0095] TTL / ImgH = 1.44, where TTL is the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens, and ImgH is half the diagonal length of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0096] |SAG41+SAG42| / CT4=1.15, where SAG41 is the distance on the optical axis from the intersection of the object side surface S7 and the optical axis of the fourth lens E4 to the vertex of the effective half-aperture of the object side surface S7 of the fourth lens E4, SAG42 is the distance on the optical axis from the intersection of the image side surface S8 and the optical axis of the fourth lens E4 to the vertex of the effective half-aperture of the image side surface S8 of the fourth lens E4, and CT4 is the center thickness of the fourth lens E4 on the optical axis.

[0097] |SAG52 / SAG51|=0.65, where SAG52 is the distance on the optical axis from the intersection of the image-side surface S10 of the fifth lens E5 and the optical axis to the vertex of the effective half-aperture of the image-side surface S10 of the fifth lens E5, and SAG51 is the distance on the optical axis from the intersection of the object-side surface S9 of the fifth lens E5 and the optical axis to the vertex of the effective half-aperture of the object-side surface S9 of the fifth lens E5.

[0098] Figure 2A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 2B The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C The distortion curve of the optical imaging lens of Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 2A to 2D It can be seen that the optical imaging lens given in Example 1 can achieve good imaging quality.

[0099] Example 2

[0100] The following is for reference Figures 3 to 4D This paper describes an optical imaging lens according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0101] like Figure 3 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S13.

[0102] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and is finally imaged on the imaging surface S13.

[0103] In this embodiment, the image-side surface S2 of the first lens E1 is cemented with the object-side surface S3 of the second lens E2 to form a cemented lens group; any one of the third lens E3, the fourth lens E4 and the fifth lens E5 is independent of its adjacent lens and has an air gap.

[0104] Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical imaging lens of Example 2, wherein the units for radius of curvature and thickness are millimeters (mm).

[0105]

[0106]

[0107] Table 4

[0108] As shown in Table 4, in Example 2, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. Table 5 shows the higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0109] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -9.4700E-03 5.8376E-01 -5.4639E+00 2.7977E+01 -8.5115E+01 1.5852E+02 -1.7713E+02 1.0895E+02 -2.8328E+01 S2 -8.7690E+00 1.5308E+02 -1.3962E+03 7.5866E+03 -2.5775E+04 5.5004E+04 -7.1396E+04 5.1415E+04 -1.5740E+04 S3 -1.8125E+00 2.9443E+01 -2.6821E+02 1.4567E+03 -4.9450E+03 1.0548E+04 -1.3702E+04 9.8890E+03 -3.0388E+03 S4 -4.2200E-02 4.2585E-01 -3.0964E+00 1.2678E+01 -3.1063E+01 4.6183E+01 -4.0694E+01 1.9531E+01 -3.9328E+00 S5 -3.6957E-01 1.6478E+00 -1.0685E+01 4.5843E+01 -1.3189E+02 2.5011E+02 -3.0098E+02 2.0831E+02 -6.2785E+01 S6 -2.3193E-01 -2.8041E-01 2.4242E+00 -9.8098E+00 2.2648E+01 -3.1186E+01 2.4959E+01 -1.0471E+01 1.7563E+00 S7 -2.6020E-02 -1.5820E-01 4.1701E-01 -1.0854E+00 1.7271E+00 -1.6052E+00 8.4908E-01 -2.3446E-01 2.6072E-02 S8 -9.6530E-02 4.8010E-01 -1.0828E+00 1.3933E+00 -1.0798E+00 5.2262E-01 -1.5627E-01 2.6590E-02 -1.9800E-03 S9 -5.7168E-01 5.9281E-01 -5.0581E-01 3.4666E-01 -1.6050E-01 4.7192E-02 -8.4700E-03 8.4900E-04 -3.6000E-05 S10 -2.6043E-01 2.3462E-01 -1.5339E-01 6.9609E-02 -2.2030E-02 4.7270E-03 -6.5000E-04 5.1600E-05 -1.8000E-06

[0110] Table 5

[0111] Table 6 gives the effective focal lengths f1 to f5 of each lens in the optical imaging lens of Example 2, the total effective focal length f, the total optical length TTL, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0112] f1(mm) 2.74 f5 (mm) -2.70 f2 (mm) -5.59 f(mm) 3.42 f3 (mm) 495.93 TTL(mm) 4.13 f4 (mm) 3.48 ImgH(mm) 2.81

[0113] Table 6

[0114] Figure 4A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4BThe astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C The distortion curve of the optical imaging lens of Embodiment 2 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 4A to 4D It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0115] Example 3

[0116] The following is for reference Figures 5 to 6D An optical imaging lens according to Embodiment 3 of this application is described. Figure 5 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown.

[0117] like Figure 5 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S12.

[0118] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S2 being concave and its image-side surface S3 being concave. In this embodiment, the image-side surface S2 of the first lens E1 and the object-side surface S2 of the second lens E2 are approximately completely overlapped, and the two are cemented together to form a cemented lens assembly.

[0119] The third lens E3 has positive optical power, with its object-side surface S4 being convex and its image-side surface S5 being convex. The fourth lens E4 has negative optical power, with its object-side surface S6 being concave and its image-side surface S7 being convex. The fifth lens E5 has negative optical power, with its object-side surface S8 being convex and its image-side surface S9 being concave. In this embodiment, any one of the third lens E3, the fourth lens E4, and the fifth lens E5 is independent of its adjacent lens and has an air gap between them.

[0120] The filter E6 has an object-side surface S10 and an image-side surface S11. Light from the object passes sequentially through each surface S1 to S11 and is finally imaged onto the imaging surface S12.

[0121] Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical imaging lens of Example 3, wherein the units for radius of curvature and thickness are millimeters (mm).

[0122]

[0123] Table 7

[0124] As shown in Table 7, in Example 3, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. Table 8 shows the higher-order coefficients that can be used for each aspherical mirror surface in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0125]

[0126]

[0127] Table 8

[0128] Table 9 gives the effective focal lengths f1 to f5 of each lens in the optical imaging lens of Example 3, the total effective focal length f, the total optical length TTL, and half the diagonal length ImgH of the effective pixel area on the imaging surface S12 of the optical imaging lens.

[0129] f1(mm) 2.93 f5 (mm) -3.03 f2 (mm) -5.88 f(mm) 4.01 f3 (mm) 5.00 TTL(mm) 4.82 f4 (mm) -400.18 ImgH(mm) 2.81

[0130] Table 9

[0131] Figure 6A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 6D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 6A to 6D It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0132] Example 4

[0133] The following is for reference Figures 7 to 8D An optical imaging lens according to Embodiment 4 of this application is described. Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown.

[0134] like Figure 7 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S13.

[0135] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and is finally imaged on the imaging surface S13.

[0136] In this embodiment, the image-side surface S2 of the first lens E1 is cemented with the object-side surface S3 of the second lens E2 to form a cemented lens group; any one of the third lens E3, the fourth lens E4 and the fifth lens E5 is independent of its adjacent lens and has an air gap.

[0137] Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical imaging lens of Example 4, wherein the units for radius of curvature and thickness are millimeters (mm).

[0138]

[0139]

[0140] Table 10

[0141] As shown in Table 10, in Example 4, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the fifth lens E5 are aspherical. Table 11 shows the higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0142] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -3.7803E-03 7.0166E-02 -3.8004E-01 1.3251E+00 -2.7467E+00 3.4189E+00 -2.4580E+00 9.3142E-01 -1.4347E-01 S2 -1.5717E+00 2.6064E+01 -2.3025E+02 1.2050E+03 -3.7533E+03 6.9871E+03 -7.6160E+03 4.4839E+03 -1.1011E+03 S3 -2.0760E-01 2.6324E+00 -2.7627E+01 1.5788E+02 -5.1689E+02 9.8493E+02 -1.0789E+03 6.2995E+02 -1.5185E+02 S4 -5.8978E-02 3.6748E-01 -2.8605E+00 1.3696E+01 -4.1895E+01 7.9007E+01 -8.9407E+01 5.5807E+01 -1.4706E+01 S5 -3.6471E-01 1.6848E+00 -1.2939E+01 6.3127E+01 -2.0002E+02 4.0379E+02 -5.0361E+02 3.5372E+02 -1.0651E+02 S6 -3.6066E-01 1.0515E+00 -5.0082E+00 1.6053E+01 -3.4440E+01 4.8235E+01 -4.2364E+01 2.1214E+01 -4.5798E+00 S7 -5.5156E-02 -1.0811E-01 5.1879E-01 -1.3989E+00 2.1059E+00 -1.9115E+00 1.0195E+00 -2.8939E-01 3.3469E-02 S8 -4.3617E-02 1.1180E-01 -1.3485E-01 1.3233E-01 -9.7540E-02 5.2348E-02 -1.8870E-02 3.9540E-03 -3.6000E-04 S9 -5.7929E-01 5.7063E-01 -4.6273E-01 3.1509E-01 -1.4814E-01 4.4498E-02 -8.1700E-03 8.3900E-04 -3.7000E-05 S10 -2.4920E-01 2.2679E-01 -1.5207E-01 6.9445E-02 -2.1280E-02 4.2570E-03 -5.3000E-04 3.7900E-05 -1.2000E-06

[0143] Table 11

[0144] Table 12 gives the effective focal lengths f1 to f5 of each lens of the optical imaging lens in Example 4, the total effective focal length f, the total optical length TTL, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0145] f1(mm) 2.70 f5 (mm) -2.66 f2 (mm) -5.96 f(mm) 3.35 f3 (mm) -26.75 TTL(mm) 4.19 f4 (mm) 3.13 ImgH(mm) 2.81

[0146] Table 12

[0147] Figure 8AThe on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 8D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 8A to 8D It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0148] Example 5

[0149] The following is for reference Figures 9 to 10D An optical imaging lens according to Embodiment 5 of this application is described. Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown.

[0150] like Figure 9 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S12.

[0151] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S2 being concave and its image-side surface S3 being convex. In this embodiment, the image-side surface S2 of the first lens E1 and the object-side surface S2 of the second lens E2 are approximately completely overlapped, and the two are cemented together to form a cemented lens assembly.

[0152] The third lens E3 has negative optical power, with its object-side surface S4 being concave and its image-side surface S5 being concave. The fourth lens E4 has positive optical power, with its object-side surface S6 being convex and its image-side surface S7 being convex. The fifth lens E5 has negative optical power, with its object-side surface S8 being convex and its image-side surface S9 being concave. In this embodiment, any one of the third lens E3, the fourth lens E4, and the fifth lens E5 is independent of its adjacent lens and has an air gap between them.

[0153] The filter E6 has an object-side surface S10 and an image-side surface S11. Light from the object passes sequentially through each surface S1 to S11 and is finally imaged onto the imaging surface S12.

[0154] Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 5, wherein the units of radius of curvature and thickness are millimeters (mm).

[0155]

[0156] Table 13

[0157] As shown in Table 13, in Example 5, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. Table 14 shows the higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0158]

[0159]

[0160] Table 14

[0161] Table 15 gives the effective focal lengths f1 to f5 of each lens of the optical imaging lens in Example 5, the total effective focal length f, the total optical length TTL, and half the diagonal length ImgH of the effective pixel area on the imaging surface S12 of the optical imaging lens.

[0162] f1(mm) 2.86 f5 (mm) -2.37 f2 (mm) -8.06 f(mm) 3.36 f3 (mm) -13.94 TTL(mm) 4.56 f4 (mm) 2.63 ImgH(mm) 2.81

[0163] Table 15

[0164] Figure 10A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 5 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Embodiment 5 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 10D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 5 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 10A to 10D It can be seen that the optical imaging lens given in Example 5 can achieve good imaging quality.

[0165] Example 6

[0166] The following is for reference Figures 11 to 12D An optical imaging lens according to Embodiment 6 of this application is described. Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown.

[0167] like Figure 11 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S13.

[0168] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and is finally imaged on the imaging surface S13.

[0169] In this embodiment, the image-side surface S2 of the first lens E1 is cemented with the object-side surface S3 of the second lens E2 to form a cemented lens group; any one of the third lens E3, the fourth lens E4 and the fifth lens E5 is independent of its adjacent lens and has an air gap.

[0170] Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 6, wherein the units of radius of curvature and thickness are millimeters (mm).

[0171]

[0172]

[0173] Table 16

[0174] As shown in Table 16, in Example 6, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. Table 17 shows the higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0175] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.0221E-02 7.8101E-02 -5.8740E-01 3.0289E+00 -9.2911E+00 1.7619E+01 -2.0135E+01 1.2717E+01 -3.4060E+00 S2 -6.8858E+00 1.2520E+02 -1.1986E+03 6.8284E+03 -2.3944E+04 5.1910E+04 -6.7648E+04 4.8500E+04 -1.4689E+04 S3 -1.2943E+00 2.0848E+01 -1.9859E+02 1.1309E+03 -3.9645E+03 8.5899E+03 -1.1180E+04 8.0016E+03 -2.4187E+03 S4 -5.9275E-02 3.2041E-01 -3.1915E+00 1.9176E+01 -7.0076E+01 1.5695E+02 -2.0979E+02 1.5429E+02 -4.7825E+01 S5 -1.8490E-01 8.7269E-02 -1.1249E+00 5.6531E+00 -2.0290E+01 4.6822E+01 -6.7538E+01 5.6112E+01 -1.9783E+01 S6 -1.6318E-01 5.7158E-02 -6.3482E-01 2.6692E+00 -7.4425E+00 1.3065E+01 -1.3865E+01 8.2179E+00 -2.0431E+00 S7 -5.1970E-02 -2.2982E-02 -7.9550E-02 1.6325E-01 -2.0916E-01 1.0840E-01 7.9790E-03 -2.0770E-02 4.0960E-03 S8 -2.8311E-02 8.3616E-02 -1.4660E-01 1.8176E-01 -1.5732E-01 9.2615E-02 -3.3930E-02 6.8320E-03 -5.7000E-04 S9 -5.7049E-01 6.0787E-01 -5.1819E-01 3.4602E-01 -1.5619E-01 4.5037E-02 -7.9700E-03 7.9000E-04 -3.4000E-05 S10 -2.4061E-01 2.2746E-01 -1.6047E-01 7.7672E-02 -2.5280E-02 5.4330E-03 -7.4000E-04 5.7700E-05 -2.0000E-06

[0176] Table 17

[0177] Table 18 gives the effective focal lengths f1 to f5 of each lens of the optical imaging lens in Example 6, the total effective focal length f, the total optical length TTL, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0178] f1(mm) 2.58 f5 (mm) -2.58 f2 (mm) -5.16 f(mm) 3.67 f3 (mm) -679.98 TTL(mm) 4.39 f4 (mm) 3.87 ImgH(mm) 2.81

[0179] Table 18

[0180] Figure 12A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Embodiment 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 12D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 6 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 12A to 12D It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0181] Example 7

[0182] The following is for reference Figures 13 to 14D An optical imaging lens according to Embodiment 7 of this application is described. Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown.

[0183] like Figure 13 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S13.

[0184] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and is finally imaged on the imaging surface S13.

[0185] In this embodiment, the image-side surface S2 of the first lens E1 is cemented with the object-side surface S3 of the second lens E2 to form a cemented lens group; any one of the third lens E3, the fourth lens E4 and the fifth lens E5 is independent of its adjacent lens and has an air gap.

[0186] Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens in the optical imaging lens of Example 7, wherein the units for radius of curvature and thickness are millimeters (mm).

[0187]

[0188] Table 19

[0189] As shown in Table 19, in Example 7, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. Table 20 shows the higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0190]

[0191]

[0192] Table 20

[0193] Table 21 gives the effective focal lengths f1 to f5 of each lens of the optical imaging lens in Example 7, the total effective focal length f, the total optical length TTL, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0194] f1(mm) 2.57 f5 (mm) -2.62 f2 (mm) -4.91 f(mm) 3.24 f3 (mm) 351.46 TTL(mm) 3.98 f4 (mm) 3.37 ImgH(mm) 2.81

[0195] Table 21

[0196] Figure 14A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 7 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 14B The astigmatism curve of the optical imaging lens of Embodiment 7 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14C The distortion curve of the optical imaging lens of Embodiment 7 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 14D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 7 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 14A to 14D It can be seen that the optical imaging lens given in Example 7 can achieve good imaging quality.

[0197] Example 8

[0198] The following is for reference Figures 15 to 16D An optical imaging lens according to Embodiment 8 of this application is described. Figure 15 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown.

[0199] like Figure 15 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: aperture stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and imaging surface S13.

[0200] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and is finally imaged on the imaging surface S13.

[0201] In this embodiment, the image-side surface S2 of the first lens E1 is cemented with the object-side surface S3 of the second lens E2 to form a cemented lens group; any one of the third lens E3, the fourth lens E4 and the fifth lens E5 is independent of its adjacent lens and has an air gap.

[0202] Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 8, wherein the units of radius of curvature and thickness are millimeters (mm).

[0203]

[0204]

[0205] Table 22

[0206] As shown in Table 22, in Embodiment 8, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. Table 23 shows the higher-order coefficients that can be used for each aspherical mirror surface in Embodiment 8, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0207] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 7.5010E-03 9.3693E-02 -7.0815E-01 3.4456E+00 -1.0062E+01 1.8182E+01 -1.9824E+01 1.1961E+01 -3.0685E+00 S2 -6.8246E+00 1.1087E+02 -9.5575E+02 4.9647E+03 -1.6038E+04 3.2234E+04 -3.9065E+04 2.6080E+04 -7.3570E+03 S3 -1.2825E+00 1.8711E+01 -1.6059E+02 8.3343E+02 -2.6910E+03 5.4034E+03 -6.5388E+03 4.3579E+03 -1.2273E+03 S4 -6.5880E-02 4.8435E-01 -4.2072E+00 2.2224E+01 -7.3780E+01 1.5311E+02 -1.9311E+02 1.3568E+02 -4.0648E+01 S5 -2.8744E-01 1.5434E+00 -1.3569E+01 6.9708E+01 -2.2703E+02 4.6557E+02 -5.8463E+02 4.0996E+02 -1.2223E+02 S6 -2.1641E-01 6.2884E-01 -4.0195E+00 1.5076E+01 -3.6478E+01 5.6196E+01 -5.3315E+01 2.8415E+01 -6.4440E+00 S7 -2.8430E-02 -1.0046E-01 2.5195E-01 -6.4392E-01 1.0589E+00 -1.1361E+00 7.2134E-01 -2.3711E-01 3.0801E-02 S8 -3.0970E-02 1.0001E-01 -1.8401E-01 2.3918E-01 -1.9909E-01 1.0618E-01 -3.4800E-02 6.3270E-03 -4.9000E-04 S9 -5.9128E-01 6.0348E-01 -4.9224E-01 3.2497E-01 -1.4658E-01 4.2136E-02 -7.3900E-03 7.2400E-04 -3.0000E-05 S10 -2.5167E-01 2.3951E-01 -1.6740E-01 8.0340E-02 -2.6020E-02 5.5700E-03 -7.5000E-04 5.8300E-05 -2.0000E-06

[0208] Table 23

[0209] Table 24 gives the effective focal lengths f1 to f5 of each lens of the optical imaging lens in Example 8, the total effective focal length f, the total optical length TTL, and half the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens.

[0210] f1(mm) 2.64 f5 (mm) -2.44 f2 (mm) -5.27 f(mm) 3.57 f3 (mm) 370.86 TTL(mm) 4.37 f4 (mm) 3.35 ImgH(mm) 2.81

[0211] Table 24

[0212] Figure 16A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 8 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 16B The astigmatism curve of the optical imaging lens of Embodiment 8 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C The distortion curve of the optical imaging lens of Example 8 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 16D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 8 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 16A to 16D It can be seen that the optical imaging lens given in Example 8 can achieve good imaging quality.

[0213] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 25.

[0214]

[0215] Table 25

[0216] This application also provides a camera device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The camera device can be a standalone camera device such as a digital camera, or a camera module integrated into a mobile electronic device such as a mobile phone. The camera device is equipped with the optical imaging lens described above.

[0217] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens comprising, in order from an object side to an image side along an optical axis, a first lens having optical power, a second lens, a third lens, a fourth lens and a fifth lens, characterized in that, the first lens has positive optical power, and an object-side surface thereof is convex; the second lens has negative optical power; the third lens has positive optical power or negative optical power; the fourth lens has positive optical power or negative optical power, and an image-side surface thereof is convex; the fifth lens has negative optical power, an object-side surface thereof is convex, and an image-side surface thereof is concave; the first lens and the second lens are cemented to form a cemented lens group; any one of the third lens, the fourth lens and the fifth lens has an air gap with its adjacent lens; the optical imaging lens has five lenses with optical power; an effective focal length f5 of the fifth lens and a total effective focal length f of the optical imaging lens satisfy -0.9 < f5 / f < -0.68; and a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy 0.47 < (R9-R10) / (R9+R10) < 0.66; a combined focal length f12 of the first lens and the second lens and a central thickness CT1 of the first lens on the optical axis satisfy 4.66 < f12 / CT1 < 6.39; a distance TTL from the object-side surface of the first lens to an image plane of the optical imaging lens on the optical axis and a half diagonal length ImgH of an effective pixel area on the image plane of the optical imaging lens satisfy 1.41 < TTL / ImgH < 1.

75. 2.The optical imaging lens according to claim 1, wherein, a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy -1.2 < R1 / R8 < -0.

50. 3.The optical imaging lens according to claim 1, wherein, a full field of view FOV of the optical imaging lens satisfies 69.9° < FOV < 80.8°. 4.The optical imaging lens according to claim 1, wherein, a maximum effective half aperture DT11 of the object-side surface of the first lens, a maximum effective half aperture DT12 of the image-side surface of the first lens, a maximum effective half aperture DT21 of the object-side surface of the second lens, a maximum effective half aperture DT22 of the image-side surface of the second lens and the half diagonal length ImgH of the effective pixel area on the image plane of the optical imaging lens satisfy 1.09 < (DT11+DT12+DT21+DT22) / ImgH < 1.

3.

5. The optical imaging lens according to claim 1, characterized in that, the maximum effective half aperture DT11 of the object-side surface of the first lens, the maximum effective half aperture DT12 of the image-side surface of the first lens, the maximum effective half aperture DT21 of the object-side surface of the second lens, the maximum effective half aperture DT22 of the image-side surface of the second lens and the distance TTL from the object-side surface of the first lens to the image plane of the optical imaging lens on the optical axis satisfy 0.7 < (DT11+DT12+DT21+DT22) / TTL < 0.

80. 6.The optical imaging lens according to claim 5, wherein, A maximum effective half-aperture radius DT11 of an object side surface of the first lens and a maximum effective half-aperture radius DT22 of an image side surface of the second lens satisfy 0.80mm≤(DT11+DT22) / 2≤0.90mm.

7. The optical imaging lens according to any one of claims 1 to 6, characterized in that, An air separation T23 of the second lens and the third lens on the optical axis, an air separation T34 of the third lens and the fourth lens on the optical axis, an air separation T45 of the fourth lens and the fifth lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, and a central thickness CT4 of the fourth lens on the optical axis satisfy 0.4<(T23+T34+T45) / (CT3+CT4)<1.

2. 8.The optical imaging lens according to any one of claims 1 to 6, wherein, The optical imaging lens further comprises a stop, a distance SL of the stop to an imaging surface of the optical imaging lens on the optical axis, and a sum ∑CT of central thicknesses of the first lens to the fifth lens on the optical axis satisfy 0.57≤∑CT / SL≤0.

72. ​ 9.The optical imaging lens according to any one of claims 1 to 6, wherein, A distance SAG41 of an intersection of the fourth lens object side surface and the optical axis to an effective half-aperture radius vertex of the fourth lens object side surface on the optical axis, a distance SAG42 of an intersection of the fourth lens image side surface and the optical axis to an effective half-aperture radius vertex of the fourth lens image side surface on the optical axis, and a central thickness CT4 of the fourth lens on the optical axis satisfy 0.66≤|SAG41+SAG42| / CT4≤1.

40. 10.The optical imaging lens according to any one of claims 1 to 6, characterized in that, A distance SAG52 of an intersection of the fifth lens image side surface and the optical axis to an effective half-aperture radius vertex of the fifth lens image side surface on the optical axis, and a distance SAG51 of an intersection of the fifth lens object side surface and the optical axis to an effective half-aperture radius vertex of the fifth lens object side surface on the optical axis satisfy 0.15≤|SAG52 / SAG51|<1.

Images