Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens barrel, a lens set and at least one spacer accommodated in the lens barrel. The lens set comprises, in sequence from the object side to the image side along the optical axis, a first lens with positive refractive power, the curvature radius of the object side surface of which is positive, and the curvature radius of the image side surface of which is negative; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with positive refractive power, the curvature radius of the object side surface of which is negative, and the curvature radius of the image side surface of which is negative; and a fifth lens with negative refractive power. The at least one spacer comprises a third spacer between the third lens and the fourth lens, the object side surface of which is in contact with the image side surface of the third lens; and a fourth spacer between the fourth lens and the fifth lens, the object side surface of which is in contact with the image side surface of the fourth lens. The curvature radius R7 of the object side surface of the fourth lens, the interval distance EP34 of the third spacer and the fourth spacer along the optical axis direction, and the inner diameter d4s of the object side surface of the fourth spacer satisfy: 0<|(R7+EP34) / d4s|<2.0.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the development of imaging technology and the rise of electronic products with imaging function, optical imaging lenses are widely used in various products and are constantly being improved and optimized. At present, the improvement direction of most imaging lenses is: how to make the imaging lens small and thin, and at the same time, select appropriate lenses with good optical property matching and study how to combine them together to ensure good imaging effect. However, in the imaging process, the light from various angles entering the imaging lens will cause multiple reflections inside and outside the lens, causing stray light interference problems, which will greatly affect the imaging quality. Therefore, how to better avoid stray light interference and other problems, while realizing the miniaturization and ultra-thin of the lens, is one of the problems that the technical personnel in the field are currently trying to solve. SUMMARY

[0003] The present application provides an optical imaging lens, which can include a lens barrel and a lens group and at least one spacer accommodated in the lens barrel. Wherein the lens group includes, in order from the object side to the image side along the optical axis: a first lens with positive refractive power, the curvature radius of the object side surface is positive, and the curvature radius of the image side surface is negative; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with positive refractive power, the curvature radius of the object side surface is negative, and the curvature radius of the image side surface is negative; and a fifth lens with negative refractive power. The at least one spacer includes: a third spacer disposed between the third lens and the fourth lens, the object side surface of which is in contact with the image side surface of the third lens; and a fourth spacer disposed between the fourth lens and the fifth lens, the object side surface of which is in contact with the image side surface of the fourth lens. The curvature radius R7 of the object side surface of the fourth lens, the interval distance EP34 of the image side surface of the third spacer and the object side surface of the fourth spacer along the optical axis direction, and the inner diameter d4s of the object side surface of the fourth spacer can satisfy: 0<|(R7+EP34) / d4s|<2.0.

[0004] In one embodiment, the at least one spacer can further include: a first spacer between the first lens and the second lens, the object side surface of which is in contact with the image side surface of the first lens, the image side surface of which is in contact with the object side surface of the second lens, and the peripheral surface of which is in contact with the lens or the lens barrel; and the maximum thickness CP3 of the third spacer can satisfy: CP3≤0.2mm.

[0005] In one embodiment, the at least one spacer can further include a first spacer located between the first lens and the second lens and in contact with an image-side surface of the first lens, and an air separation T12 of the first lens and the second lens on the optical axis and a maximum thickness CP1 of the first spacer can satisfy: 1.0 < T12 / CP1 < 9.0.

[0006] In one embodiment, the at least one spacer can further include a second spacer located between the second lens and the third lens and in contact with an image-side surface of the second lens, and an air separation T23 of the second lens and the third lens on the optical axis and a central thickness CT2 of the second lens on the optical axis and a maximum thickness CP2 of the second spacer can satisfy: 18.5 < (T23 + CT2) / CP2 < 35.5.

[0007] In one embodiment, the at least one spacer can further include a first spacer located between the first lens and the second lens and in contact with an image-side surface of the first lens, and a second spacer located between the second lens and the third lens and in contact with an image-side surface of the second lens, and a central thickness CT1 of the first lens on the optical axis, a central thickness CT4 of the fourth lens on the optical axis, and a separation distance EP12 of the image-side surface of the first spacer and the object-side surface of the second spacer in the direction of the optical axis can satisfy: 1.5 < (CT1 + CT4) / EP12 < 3.0.

[0008] In one embodiment, an effective focal length f3 of the third lens, a central thickness CT2 of the second lens on the optical axis, an air separation T34 of the third lens and the fourth lens on the optical axis, and a separation distance EP34 of the image-side surface of the third spacer and the object-side surface of the fourth spacer in the direction of the optical axis can satisfy: 5.5 < f3 / (CT2 + T34 + EP34) < 8.5.

[0009] In one embodiment, the at least one spacer can further include a second spacer located between the second lens and the third lens and in contact with an image-side surface of the second lens, and an outer diameter D2m of the image-side surface of the second spacer, an outer diameter D3s of the object-side surface of the third spacer, a curvature radius R4 of the image-side surface of the second lens, and a curvature radius R5 of the object-side surface of the third lens can satisfy: 1.0 < |(D2m + D3s) / (R4 + R5)| < 2.0.

[0010] In one embodiment, the at least one spacer can further include a first spacer located between the first lens and the second lens and in contact with an image side surface of the first lens, an outer diameter D4m of an image side surface of the fourth spacer, an outer diameter D1m of an image side surface of the first spacer, and a radius of curvature R7 of an object side surface of the fourth lens can satisfy: 1.0 < |(D4m+D1m) / R7| < 4.5.

[0011] In one embodiment, a radius of curvature R9 of an object side surface of the fifth lens, an outer diameter D4s of an object side surface of the fourth spacer, and an inner diameter d4s of the object side surface of the fourth spacer can satisfy: 0.5 < R9 / (D4s-d4s) < 4.0.

[0012] In one embodiment, the at least one spacer can further include a second spacer located between the second lens and the third lens and in contact with an image side surface of the second lens, an effective focal length f2 of the second lens, an effective focal length f3 of the third lens, a separation distance EP23 of the image side surface of the second spacer and the object side surface of the third spacer in the direction of the optical axis, and a central thickness CT3 of the third lens on the optical axis can satisfy: 8.5 < |(f2+f3) / (EP23-CT3)| < 115.5.

[0013] In one embodiment, the at least one spacer can further include a first spacer located between the first lens and the second lens and in contact with an image side surface of the first lens, a radius of curvature R2 of the image side surface of the first lens, a radius of curvature R1 of the object side surface of the first lens, an outer diameter D1s of the object side surface of the first spacer, and an inner diameter d1s of the object side surface of the first spacer can satisfy: 4.5 < |(R2-R1) / (D1s-d1s)| < 13.0.

[0014] In one embodiment, an effective focal length f4 of the fourth lens, a maximum thickness CP3 of the third spacer, and a maximum thickness CP4 of the fourth spacer can satisfy: 4.0 < f4 / (CP3+CP4) < 32.5.

[0015] In one embodiment, the at least one spacer can further include a second spacer located between the second lens and the third lens and in contact with an image side surface of the second lens, a distance TD of the object side surface of the first lens to the image side surface of the fifth lens on the optical axis, an inner diameter d3s of the object side surface of the third spacer, and an inner diameter d2s of the object side surface of the second spacer can satisfy: 3.0 < TD / (d3s-d2s) < 9.5.

[0016] In one embodiment, the sum of the central thicknesses of the first lens to the fifth lens on the optical axis ∑CT, the inner diameter of the image side surface of the fourth spacer d4mand the inner diameter of the image side surface of the third spacer d3mays satisfy: 1.5<|∑CT / (d4m-d3m)|<113.0.

[0017] In one embodiment, the maximum thickness CP4of the fourth spacer may satisfy: CP4≤0.3mm.

[0018] In one embodiment, the inner surface of the fourth spacer is a Lambertian surface.

[0019] The present application adopts a five-piece lens architecture, and by reasonably matching the focal power and surface shape of each lens, the field curvature, astigmatism, distortion and lateral chromatic aberration can be controlled in a suitable range, thereby improving the imaging quality. In addition, by reasonably setting the spacers, the propagation path of stray light in the non-effective diameter part of the fourth lens is intercepted by the fourth spacer, which can greatly avoid the local influence of stray light on the imaging of the optical imaging lens, thereby further improving the imaging quality. In addition, according to the embodiments of the present application, by optimizing the structural design of the lens, including reasonably setting the shape, size and spacing of each lens and each spacer, the optical imaging lens can be miniaturized and thinned, and the problems of stray light interference can be more effectively solved, so that the lens has higher imaging quality, and better processing process can be obtained, the lens-to-lens bearing relationship can be more reasonable, the system sensitivity can be reduced, the system stability can be improved, the product field curvature control can be better, and the product yield can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects, and advantages of the present 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 The structure and part of the optical imaging lens according to the exemplary embodiments of the present application are shown in the schematic diagram;

[0022] Figure 2 The schematic diagram of the stray light in the non-effective diameter part of the fourth lens being intercepted by the fourth spacer is shown;

[0023] Figures 3A to 3C The structure schematic diagrams of the optical imaging lens according to the embodiment 1 of the present application in three embodiments are shown respectively;

[0024] Figure 4A and Figure 4B The schematic diagrams of the peripheral surface (B) of the first spacer between the first lens and the second lens contacting the lens barrel and contacting the lens are shown respectively;

[0025] Figure 5A A schematic view showing the case that stray light is incident on the inner surface (C) of the fourth spacer located between the fourth lens and the fifth lens is shown;

[0026] Figure 5B A partial enlarged view of Figure 5A A schematic view showing the case that the inner surface (C) of the fourth spacer is a Lambertian surface and the stray light incident thereon is uniformly scattered out is shown;

[0027] Figures 6A to 6D The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 are shown respectively;

[0028] Figure 7A and Figure 7B The structural schematic views of the optical imaging lens according to Embodiment 2 of the present application in two implementation manners are shown respectively;

[0029] Figures 8A to 8D The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 are shown respectively;

[0030] Figure 9A and Figure 9B The structural schematic views of the optical imaging lens according to Embodiment 3 of the present application in two implementation manners are shown respectively;

[0031] Figures 10A to 10D The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 are shown respectively;

[0032] Figure 11A and Figure 11B The structural schematic views of the optical imaging lens according to Embodiment 4 of the present application in two implementation manners are shown respectively; and

[0033] Figures 12A to 12D The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens of Embodiment 4 are shown respectively. DETAILED DESCRIPTION

[0034] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended in any way to limit the scope of the present application. Throughout the description, like reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0035] It should be noted that the terms first, second, third, etc. are used herein only to distinguish one feature from another, and do not denote any limitation. Thus, a first lens discussed below can also be termed a second lens or a third lens, without departing from the teachings of the present application.

[0036] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0037] In this context, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made according to the general method in the art, for example, judging convexity or concavity by the sign of R value (R refers to the radius of curvature in the paraxial region). In this context, the surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0038] It should also be understood that the use of the terms "including", "including have", "have", "contain" and / or "contain have", when used in this specification, means that there are present the stated features, elements and / or components, but does 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, it modifies the entire list of features and not the individual elements of the list. Furthermore, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to mean example or illustrative.

[0039] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that the terms used herein (e.g., terms defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0040] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. The following embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but can not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are within the protection scope of the present application. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0041] The features, principles and other aspects of the present application are described in detail below.

[0042] The optical imaging lens according to the exemplary embodiments of the present application can include a lens barrel structure, and inside the lens barrel structure, a lens group and at least one spacer can be further included. The spacer can be arranged between each lens included in the lens group.

[0043] In the exemplary embodiments, for example, five lenses can be included in the lens barrel, and arranged in order from the object side to the image side along the optical axis as follows: a first lens, a second lens, a third lens, a fourth lens and a fifth lens. Among them, the first lens can have a positive focal power; the second lens can have a negative focal power; the third lens can have a positive focal power; the fourth lens can have a positive focal power; and the fifth lens can have a negative focal power.

[0044] In the exemplary embodiments, the curvature radius of the object side surface of the first lens can be positive, and the curvature radius of the image side surface can be negative.

[0045] In the exemplary embodiments, the curvature radius of the object side surface of the fourth lens can be negative, and the curvature radius of the image side surface can be negative.

[0046] By reasonably controlling the focal power and surface type of each lens in the optical imaging lens, the field curvature, astigmatism, distortion and lateral chromatic aberration can be controlled in a suitable range, so as to improve the imaging quality.

[0047] In the exemplary embodiments, a first spacer can be arranged between the first lens and the second lens, and the object side surface of the first spacer can be in contact with the image side surface of the first lens.

[0048] In the exemplary embodiments, a second spacer can be arranged between the second lens and the third lens, and the object side surface of the second spacer can be in contact with the image side surface of the second lens.

[0049] In the exemplary embodiments, a third spacer can be arranged between the third lens and the fourth lens, and the object side surface of the third spacer can be in contact with the image side surface of the third lens.

[0050] In the exemplary embodiments, a fourth spacer can be arranged between the fourth lens and the fifth lens, and the object side surface of the fourth spacer can be in contact with the image side surface of the fourth lens.

[0051] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0<|(R7+EP34) / d4s|<2.0, wherein R7 is the curvature radius of the object side surface of the fourth lens, EP34 is the interval distance between the image side surface of the third spacer and the object side surface of the fourth spacer along the optical axis direction, and d4s is the inner diameter of the object side surface of the fourth spacer. By controlling the absolute value of the ratio of the sum of the curvature radius of the object side surface of the fourth lens and the interval distance between the image side surface of the third spacer and the object side surface of the fourth spacer along the optical axis direction to the inner diameter of the object side surface of the fourth spacer within the range, it is beneficial to control the propagation path of stray light in the non-effective diameter part of the fourth lens (E4) to be intercepted by the fourth spacer (P4) exactly, as shown in Figure 2 which can largely avoid the local influence of stray light on the imaging of the optical imaging lens, thereby further improving the imaging quality. More specifically, R7, EP34 and d4s can satisfy: 0.2<|(R7+EP34) / d4s|<1.9.

[0052] In exemplary embodiments, a first spacer can be arranged between the first lens and the second lens, the object side surface thereof can be in direct contact with the image side surface of the first lens, the image side surface thereof can be in contact with the object side surface of the second lens, and the peripheral surface (B) thereof can be in contact with the lens or the lens barrel. As shown in Figure 4A which is a schematic diagram of the case where the peripheral surface (B) of the first spacer (P1) is in contact with the inner side surface of the lens barrel; Figure 4B which is a schematic diagram of the case where the peripheral surface (B) of the first spacer (P1) is in contact with the lens (e.g., the first lens E1). The first spacer is assembled in multiple ways, which is for the consideration of reliability performance, and at the same time, the spacer is assembled with the lens barrel, which can improve the assembly precision and avoid the spacer offset and other situations, which is beneficial to eliminate the light leakage phenomenon caused by the spacer offset.

[0053] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula CP3≤0.2mm, wherein CP3 is the maximum thickness of the third spacer in the direction along or parallel to the optical axis. By controlling the maximum thickness of the third spacer in the direction along or parallel to the optical axis within the range, the thickness of the third spacer will not be too thick, and since this is the auxiliary supporting position of the fourth lens, a reasonable spacer thickness is beneficial to improve the supporting stability. More specifically, CP3 can satisfy: CP3≤0.19mm.

[0054] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 1.0 < T12 / CP1 < 9.0, wherein T12 is the air gap of the first lens and the second lens on the optical axis, and CP1 is the maximum thickness of the first spacer in the direction along or parallel to the optical axis. Since the first air gap between the first lens and the second lens is the position with the largest system field curvature sensitivity, by controlling the ratio of the air gap of the first lens and the second lens on the optical axis to the maximum thickness of the first spacer in the direction along or parallel to the optical axis in this range, the size of the spacer thickness and the air gap at this position can be reasonably controlled, so that the air gap at this position will not be greatly affected by the spacer change under extreme conditions of high temperature and high humidity, and the working condition interval of the lens is improved. More specifically, T12 and CP1 can satisfy: 1.2 < T12 / CP1 < 8.8.

[0055] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 18.5 < (T23+CT2) / CP2 < 35.5, wherein T23 is the air gap of the second lens and the third lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and CP2 is the maximum thickness of the second spacer in the direction along or parallel to the optical axis. By controlling the ratio of the sum of the air gap of the second lens and the third lens on the optical axis and the center thickness of the second lens to the maximum thickness of the second spacer in the direction along or parallel to the optical axis in this range, the center thickness of the second lens is reasonably controlled, the risk of the second lens being convex on the image side can be avoided, and the thickness of the second spacer and the air gap of the second lens and the third lens on the optical axis are reasonably controlled, which can effectively alleviate the small group stand difference between the second lens and the third lens, so that the stability of this group is guaranteed, and the thickness of the second spacer is reasonably set, which can control the reflection area of the inner diameter surface, reduce the risk of black light, and at the same time, the sensitivity is higher, the spacer thickness is selected from a stable model, which is beneficial to the control of the field curvature of the finished product, thereby improving the yield of the product.

[0056] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 1.5 < (CT1+CT4) / EP12<3.0, wherein CT1 is the center thickness of the first lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and EP12 is the interval distance between the image side surface of the first spacer and the object side surface of the second spacer along the optical axis direction. Since the middle thickness of the first lens and the fourth lens is the thickest, reasonable control of the middle thickness can effectively control the thickness ratio to obtain a lens with better forming processability, avoid the generation of forming stress residues and welding marks; by controlling the ratio of the sum of the center thickness of the first lens on the optical axis and the center thickness of the fourth lens on the optical axis to the interval distance between the image side surface of the first spacer and the object side surface of the second spacer along the optical axis direction in this range, the front and rear can have enough safety distance after the whole optical system is matched with the lens barrel, preventing the risk of scratching the front and rear lenses. More specifically, CT1, CT4 and EP12 can satisfy: 1.6 < (CT1+CT4) / EP12<2.9.

[0057] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 5.5 < f3 / (CT2+T34+EP34)<8.5, wherein f3 is the effective focal length of the third lens, CT2 is the center thickness of the second lens on the optical axis, T34 is the air interval of the third lens and the fourth lens on the optical axis, and EP34 is the interval distance between the image side surface of the third spacer and the object side surface of the fourth spacer along the optical axis direction. By controlling the effective focal length of the third lens, the center thickness of the second lens on the optical axis, the air interval of the third lens and the fourth lens on the optical axis, and the interval distance between the image side surface of the third spacer and the object side surface of the fourth spacer along the optical axis direction to satisfy 5.5 < f3 / (CT2+T34+EP34)<8.5, the effective focal length of the third lens and the fourth lens can be better connected, thereby obtaining more excellent light converging ability, while balancing the control of the second lens middle thickness data, which can effectively avoid the reflection stray light generated between the second, third and fourth lenses, and reasonable spacer distance ratio can effectively control the air gap variation, obtain better stress simulation performance, and avoid poor drop caused by small angle drop. More specifically, f3, CT2, T34 and EP34 can satisfy: 5.7 < f3 / (CT2+T34+EP34)<8.5.

[0058] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 1.0<|(D2m+D3s) / (R4+R5)|<2.0, wherein D2m is the outer diameter of the image side surface of the second spacer, D3s is the outer diameter of the object side surface of the third spacer, R4 is the curvature radius of the image side surface of the second lens, and R5 is the curvature radius of the object side surface of the third lens. By controlling the outer diameter of the image side surface of the second spacer, the outer diameter of the object side surface of the third spacer, the curvature radius of the image side surface of the second lens, and the curvature radius of the object side surface of the third lens to satisfy 1.0<|(D2m+D3s) / (R4+R5)|<2.0, and reasonably controlling the curvature radii of the second lens and the third lens, the lens curvature can be effectively improved, so that the spatial change amount of the lens is smaller in the assembly simulation process, thereby obtaining better reliability performance; at the same time, the control of the second spacer and the third spacer can effectively distinguish black object spacers with similar outer diameters, facilitate subsequent assembly recognition by the assembly machine, serve as a distinguishing recognition mark, and also make the lens bearing transition more reasonable, so that the lens can obtain more stable mass production performance. More specifically, D2m, D3s, R4, and R5 can satisfy 1.1<|(D2m+D3s) / (R4+R5)|<1.9.

[0059] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 1.0<|(D4m+D1m) / R7|<4.5, wherein D4m is the outer diameter of the image side surface of the fourth spacer, D1m is the outer diameter of the image side surface of the first spacer, and R7 is the curvature radius of the object side surface of the fourth lens. By controlling the outer diameter of the image side surface of the fourth spacer, the outer diameter of the image side surface of the first spacer, and the curvature radius of the object side surface of the fourth lens to satisfy 1.0<|(D4m+D1m) / R7|<4.5, and controlling the outer diameters of the first spacer and the fourth spacer, the assembly step difference of the first lens and the second lens, and the fourth lens and the fifth lens can be effectively controlled, the structure with large step difference is reduced, thereby obtaining a more reasonable bearing relationship between the lenses, so that more excellent air gap change sensitivity can be obtained in the axial pressure simulation, and meanwhile, in cooperation with the curvature radius of the fourth lens, the change amount of the air gap under the stress of the fourth lens can be effectively improved, and the system sensitivity is reduced. More specifically, D4m, D1m, and R7 can satisfy 1.1<|(D4m+D1m) / R7|<4.4.

[0060] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 0.5 < R9 / (D4s-d4s) < 4.0, where R9 is the curvature radius of the object side surface of the fifth lens, D4s is the outer diameter of the object side surface of the fourth spacer, and d4s is the inner diameter of the object side surface of the fourth spacer. By controlling the curvature radius of the fifth lens, the risk of the fifth lens exceeding the bottom surface can be eliminated, and the risk of appearance scratches can be avoided; by controlling the curvature radius of the object side surface of the fifth lens, the outer diameter of the object side surface of the fourth spacer, and the inner diameter of the object side surface of the fourth spacer to satisfy 0.5 < R9 / (D4s-d4s) < 4.0, the risk of light leakage and stray light can be effectively improved, and the outer diameter of the object side surface of the fourth spacer is different from the previous spacers, which can be used as a distinguishing mark to distinguish different components and prevent mixed loading; the size of the annular band of the fourth spacer is controlled synchronously to prevent the generation of new stray light due to the deformation of the spacer during baking. More specifically, R9, D4s, and d4s can satisfy 0.5 < R9 / (D4s-d4s) < 3.9.

[0061] In exemplary embodiments, the optical imaging lens of the present application can satisfy the condition formula 8.5 < |(f2+f3) / (EP23-CT3)| < 115.5, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, EP23 is the interval distance between the image side surface of the second spacer and the object side surface of the third spacer along the optical axis, and CT3 is the center thickness of the third lens on the optical axis. By controlling the effective focal lengths of the second lens and the third lens, the optical length of the lens can be effectively reduced, so that a thinner module thickness is obtained when the module is combined, and the required installation space of the lens in electronic devices such as mobile phones is smaller; by controlling the effective focal lengths of the second lens and the third lens, the interval distance between the image side surface of the second spacer and the object side surface of the third spacer along the optical axis, and the center thickness of the third lens on the optical axis to satisfy 8.5 < |(f2+f3) / (EP23-CT3)| < 115.5, the third sensitive lens can obtain better overall lens thickness uniformity, reduce the risk of surface asperity, and the reasonable interval of the spacer can effectively filter the lens internal reflection stray light generated near the third lens, so that the imaging result is clearer and cleaner.

[0062] In exemplary embodiments, the optical imaging lens of the present application can satisfy condition formula 4.5<|(R2-R1) / (D1s-d1s)|<13.0, wherein R2 is the curvature radius of the image side surface of the first lens, R1 is the curvature radius of the object side surface of the first lens, D1s is the outer diameter of the object side surface of the first spacer, and d1s is the inner diameter of the object side surface of the first spacer. By controlling the curvature radii of the object side surface and the image side surface of the first lens, a more smooth necking structure can be obtained at the junction of the lens effective diameter part and the lens part, and structural reverse bending is not easy to occur, and the lens thickness ratio will be smaller, and the forming process is not easy to produce welding marks; by controlling the curvature radius of the image side surface of the first lens, the curvature radius of the object side surface of the first lens, the outer diameter of the object side surface of the first spacer, and the inner diameter of the object side surface of the first spacer to satisfy 4.5<|(R2-R1) / (D1s-d1s)|<13.0, the excessive light rays with poor edge quality can be effectively avoided, and light leakage is prevented, and the first spacer bears the function of absorbing most of the internal stray light, and reasonable inner diameter value can greatly reduce the risk level of stray light. More specifically, R2, R1, D1s, and d1s can satisfy: 4.7<|(R2-R1) / (D1s-d1s)|<12.9.

[0063] In exemplary embodiments, the optical imaging lens of the present application can satisfy condition formula 4.0<f4 / (CP3+CP4)<32.5, wherein f4 is the effective focal length of the fourth lens, CP3 is the maximum thickness of the third spacer in the direction along or parallel to the optical axis, and CP4 is the maximum thickness of the fourth spacer in the direction along or parallel to the optical axis. By controlling the thicknesses of the third and fourth spacers, the total axial length of the lens and the spacer stack can be effectively controlled, so that the axial length of the lens can be controlled within a reasonable range, and the risk of interference between the third and fourth spacers and the corresponding lens barrel false bearing surfaces can be avoided; by controlling the ratio of the effective focal length of the fourth lens to the sum of the maximum thickness of the third spacer in the direction along or parallel to the optical axis and the maximum thickness of the fourth spacer in the direction along or parallel to the optical axis within the range, the focal point position of the fourth lens falling on the axis can be effectively moved forward, so that the air gap between the fourth lens and the fifth lens can be reduced, the gap sensitivity can be reduced, and the adjustment and improvement of the actual field curvature in subsequent production can be facilitated. More specifically, f4, CP3, and CP4 can satisfy: 4.1<f4 / (CP3+CP4)<32.3.

[0064] In an example embodiment, the optical imaging lens of the present application can satisfy condition formula 3.0 < TD / (d3s-d2s) < 9.5, where TD is the distance on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens, d3s is the inner diameter of the object side surface of the third spacer, and d2s is the inner diameter of the object side surface of the second spacer. By controlling the on-axis distance parameter of the first lens object side surface to the fifth lens image side surface, the total length of the lens can be effectively controlled, the miniaturization and light weight design can be met, the lens axial length is minimized, and the pursuit of the light and thin characteristics of the mainstream mobile phone is more in line with. At the same time, cooperating with the inner diameter of the third spacer and the second spacer, the stray light generated by the lens is avoided, the performance is affected, and at the same time the inner diameter of the spacer is controlled reasonably, so that the lens will not leak out the structure sandblasting whitening part when viewed from the first lens, so that the overall appearance is more beautiful. More specifically, TD, d3s and d2s can satisfy: 3.2 < TD / (d3s-d2s) < 9.3.

[0065] In an example embodiment, the optical imaging lens of the present application can satisfy condition formula 1.5 < |∑CT / (d4m-d3m)| < 113.0, where ∑CT is the sum of the center thicknesses of the first lens to the fifth lens on the optical axis, d4m is the inner diameter of the image side surface of the fourth spacer, and d3m is the inner diameter of the image side surface of the third spacer. By controlling the sum of the center thicknesses of the first lens to the fifth lens on the optical axis, the inner diameter of the image side surface of the fourth spacer, and the inner diameter of the image side surface of the third spacer satisfy 1.5 < |∑CT / (d4m-d3m)| < 113.0, the sum of the thicknesses of all lenses on the axis is controlled, the distance between the imaging surface of the optical system and the tail end of the lens barrel can be reduced, a greater focusing stroke can be obtained under the premise of a certain module height, thereby obtaining a more rapid focusing response, and at the same time, controlling the inner diameter of the spacer can make the annular band more reasonable, improve the assembly stability of the fourth lens and the fifth lens, and the closer the assembly of the lens near the image surface is, the better the overall reliability of the lens is, and the performance of the lens in extreme environmental conditions can be improved.

[0066] In an example embodiment, the optical imaging lens of the present application can satisfy condition formula CP4≤0.3mm, where CP4 is the maximum thickness of the fourth spacer in the direction along or parallel to the optical axis. By controlling the maximum thickness of the fourth spacer in the direction along or parallel to the optical axis within this range, it not only has the effect of blocking stray light but also can play the role of bearing, has great design freedom, is convenient for coping with different design requirements, and can further adjust the field curvature. More specifically, CP4 can satisfy: CP4≤0.28mm.

[0067] In an example embodiment, the inner surface (C) of the fourth spacer can be a Lambert surface. The inner surface (C) of the fourth spacer (P4) located between the fourth lens and the fifth lens and directly contacting the image side surface of the fourth lens is made into an arc-shaped Lambert surface, as shown inFigure 5A and Figure 5B As shown, the stray light uniformly dispersed on the inner surface of the fourth spacer can avoid concentrated incidence of stray light into the receiving device, greatly weaken the local influence of stray light on imaging, and ensure good imaging quality.

[0068] In exemplary embodiments, the optical imaging lens of the present application can include at least one diaphragm. The diaphragm can constrain the light path and control the light intensity. The diaphragm can be arranged at an appropriate position of the optical imaging lens, for example, the diaphragm can be arranged between the object side and the first lens.

[0069] In exemplary embodiments, the optical imaging lens described above can further include an optical filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0070] The optical imaging lens according to the above embodiments of the present application can adopt multiple lenses, for example, five lenses as described above. According to the embodiments of the present application, by reasonably matching the optical power and surface type of the first to fifth lenses, the field curvature, astigmatism, distortion, and lateral chromatic aberration can be effectively controlled within a reasonable range, which is beneficial to improve the imaging quality. Moreover, by reasonably arranging the third spacer and the fourth spacer, controlling the radius of curvature of the object side surface of the fourth lens, the interval distance between the image side surface of the third spacer and the object side surface of the fourth spacer along the optical axis direction, and the inner diameter of the object side surface of the fourth spacer satisfy 0<|(R7+EP34) / d4s|<2.0, it is beneficial to control the propagation path of stray light in the non-effective diameter part of the fourth lens to be intercepted by the fourth spacer, which can greatly avoid the local influence of stray light on the imaging of the optical imaging lens, thereby further improving the imaging quality. In addition, according to the embodiments of the present application, by optimizing the structural design of the lens, including reasonably setting the shape, size, and spacing of each lens and each spacer, and other features, the optical imaging lens can be miniaturized, ultra-thin, and light-weighted, and more effectively solve the problem of stray light interference, so that the lens has higher imaging quality, improves the system stability, and can better meet the high demand of the development of current devices such as mobile phones and smart wear.

[0071] In embodiments of this application, at least one of the mirror surfaces of the first lens, second lens, third lens, fourth lens, and fifth lens may be an aspherical mirror surface; that is, at least one aspherical mirror surface may be included from the object-side surface of the first lens to the image-side surface of the fifth lens. 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 radius of curvature 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, at least one of the object-side and image-side surfaces of each of the first, second, third, fourth, and fifth lenses may be an aspherical mirror surface. Optionally, both the object-side and image-side surfaces of each of the first, second, third, fourth, and fifth lenses may be aspherical mirror surfaces.

[0072] However, those skilled in the art will understand that, without departing from the technical solutions claimed in this application, the number of lenses constituting the optical imaging lens, and also the number of spacers, 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 embodiment, the optical imaging lens is not limited to including five lenses. If desired, the optical imaging lens may include other numbers of lenses. As another example, although four spacers are described as an example in the embodiment, the optical imaging lens is not limited to including four spacers. If desired, the optical imaging lens may include other numbers of spacers.

[0073] 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.

[0074] Example 1

[0075] The following is for reference Figures 3A to 3C as well as Figures 6A to 6D Describes an optical imaging lens according to Embodiment 1 of this application. Figures 3A to 3C Schematic diagrams of the optical imaging lens according to Embodiment 1 of this application are shown in three different embodiments.

[0076] like Figures 3A to 3C As shown, the optical imaging lens includes a lens barrel P0 and, housed within the lens barrel P0, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side.

[0077] The first lens E1 has positive refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface. The second lens E2 has negative refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface. The third lens E3 has positive refractive power, the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface. The fourth lens E4 has positive refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface. The fifth lens E5 has negative refractive power, the object side surface S9 is a convex surface, and the image side surface S10 is a concave surface. The optical imaging lens can further include a filter E6, which can have an object side surface S11 and an image side surface S12 (not shown). The optical imaging lens can further include a protective glass E7, which can have an object side surface S13 and an image side surface S14 (not shown). The optical imaging lens can further include an imaging surface S15 (not shown), and light from an object can pass through the surfaces S1 to S14 in sequence and finally be imaged on the imaging surface S15.

[0078] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0079]

[0080] Table 1

[0081] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0082]

[0083] wherein x is the sag of the aspherical surface at a height 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 inverse of the radius of curvature R in Table 1 above), k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Tables 2-1 and 2-2 below give the high-order coefficients A4, A6, A8, A10, and A12 that can be used for the aspherical surfaces S1 to S10 in Example 1. 10 12 14 16 18 20 22 24 26 28 30 .

[0084]

[0085] ​​​​​​​​​​

[0086] Table 2-1

[0087] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.3912E-06 2.1777E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.0543E-06 -5.7234E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 2.4063E-06 -4.3326E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -2.2292E-05 -9.2822E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -4.4224E-06 -1.4032E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 4.2065E-06 -2.3128E-05 -2.2408E-06 5.8171E-09 1.5116E-09 0.0000E+00 0.0000E+00 S7 2.7380E-05 2.7662E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -1.9651E-04 -2.0226E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -1.8804E-03 -6.2558E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 2.8783E-04 4.1056E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0088] Table 2-2

[0089] Exemplarily, as shown in Figure 3A , Figure 3B and Figure 3C , correspond to Embodiment 1-1, 1-2 and 1-3 respectively. According to Embodiment 1-1, 1-2 and 1-3, the optical imaging lens can further include at least one spacer disposed between lenses accommodated in the lens barrel P0. For example, a first spacer P1 disposed between the first lens and the second lens and in contact with the image side surface of the first lens; a second spacer P2 disposed between the second lens and the third lens and in contact with the image side surface of the second lens; a third spacer P3 disposed between the third lens and the fourth lens and in contact with the image side surface of the third lens; and a fourth spacer P4 disposed between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens.

[0090] As shown in Figure 3A , Figure 3C , according to Embodiment 1-1 and 1-3, the peripheral surface (B) of the first spacer P1 is in contact with the inner surface of the lens barrel P0, and the partial schematic diagram can refer to Figure 4A .

[0091] As shown in Figure 3B , according to Embodiment 1-2, the peripheral surface (B) of the first spacer P1 is in contact with the first lens E1, and the partial schematic diagram can refer to Figure 4B .

[0092] In Embodiments 1-1, 1-2 and 1-3, the relevant parameter values are shown in Table 9, respectively, wherein D1s is the outer diameter of the object-side surface of the first spacer; d1s is the inner diameter of the object-side surface of the first spacer; D2m is the outer diameter of the image-side surface of the second spacer; d2s is the inner diameter of the object-side surface of the second spacer; D3s is the outer diameter of the object-side surface of the third spacer; d3s is the inner diameter of the object-side surface of the third spacer; d3m is the inner diameter of the image-side surface of the third spacer; D4m is the outer diameter of the image-side surface of the fourth spacer; D4s is the outer diameter of the object-side surface of the fourth spacer; d4s is the inner diameter of the object-side surface of the fourth spacer; d4m is the inner diameter of the image-side surface of the fourth spacer; CP1 is the maximum thickness of the first spacer P1 in a direction along or parallel to the optical axis; CP2 is the maximum thickness of the second spacer P2 in a direction along or parallel to the optical axis; CP3 is the maximum thickness of the third spacer P3 in a direction along or parallel to the optical axis; CP4 is the maximum thickness of the fourth spacer P4 in a direction along or parallel to the optical axis; EP12 is the separation distance between the image-side surface of the first spacer P1 and the object-side surface of the second spacer P2 in a direction along the optical axis; EP23 is the separation distance between the image-side surface of the second spacer P2 and the object-side surface of the third spacer P3 in a direction along the optical axis; EP34 is the separation distance between the image-side surface of the third spacer P3 and the object-side surface of the fourth spacer P4 in a direction along the optical axis. The units of the above parameters shown in Table 9 are millimeters (mm).

[0093] Figure 6A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of light rays of different wavelengths from the converging focus point after passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Embodiment 1 is shown, which represents the distortion size values corresponding to different image heights. Figure 6D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of light rays on the imaging plane after passing through the lens at different image heights. According to Figures 6A to 6D It can be seen that the optical imaging lens of Embodiment 1 can achieve good imaging quality.

[0094] Example 2

[0095] The optical imaging lens according to Embodiment 2 of the present application is described below with reference to Figure 7A , Figure 7B and Figures 8A to 8D . In this embodiment and the following embodiments, some descriptions similar to Embodiment 1 will be omitted for brevity. Figure 7A and Figure 7BSchematic diagrams of the optical imaging lens according to Embodiment 2 of this application are shown in two different embodiments.

[0096] like Figure 7A and Figure 7B As shown, the optical imaging lens includes a lens barrel P0 and, housed within the lens barrel P0, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side.

[0097] 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 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 optical imaging lens may also include a filter E6, which may have an object-side surface S11 and an image-side surface S12 (not shown). The optical imaging lens may also include a protective glass E7, which may have an object-side surface S13 and an image-side surface S14 (not shown). The optical imaging lens may also include an imaging surface S15 (not shown), on which light from an object may pass sequentially through surfaces S1 to S14 and ultimately be imaged.

[0098] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 4-1 and 4-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1 to S10 in Example 2. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0099]

[0100] Table 3

[0101] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.5656E-03 -2.2710E-03 -3.2416E-04 -4.4052E-05 -1.6897E-05 -7.2654E-06 -4.3112E-06 S2 -2.0691E-02 -1.1257E-04 -6.6281E-05 4.2367E-04 -5.5852E-05 4.6523E-05 3.3195E-06 S3 -3.7838E-02 3.9365E-04 -4.8346E-04 4.3556E-04 -2.1522E-04 1.4884E-05 -1.5860E-05 S4 -9.2672E-03 -2.3345E-03 1.0448E-04 9.7913E-04 2.8780E-05 7.9782E-05 -4.2515E-06 S5 -1.0009E-01 -3.3878E-04 1.7649E-03 2.6447E-03 9.2839E-04 1.9236E-04 -9.8231E-05 S6 -1.6210E-01 -6.2199E-03 3.4377E-03 3.1926E-03 9.9815E-04 4.1214E-04 2.1068E-05 S7 -6.3754E-02 -2.4434E-03 -5.5761E-03 1.6105E-03 -2.8755E-03 -1.6178E-04 -6.4864E-04 S8 5.6068E-02 6.3133E-02 -1.4834E-02 -3.2227E-03 -2.4740E-03 1.9664E-03 -1.2286E-04 S9 -4.6965E-01 2.8923E-02 3.5965E-02 -2.4155E-02 1.1663E-02 -3.6456E-03 1.6668E-03 S10 -9.1881E-01 -2.1095E-02 -1.9388E-02 -9.9574E-03 4.2991E-03 -1.7172E-03 2.6318E-03

[0102] Table 4-1

[0103] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.1171E-06 -1.1467E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.1574E-05 1.8601E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 5.7454E-06 -1.7886E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -6.5840E-07 -3.2988E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -6.6150E-05 -3.7834E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.1897E-05 -1.0733E-05 -1.7437E-06 4.1691E-06 -1.2872E-06 0.0000E+00 0.0000E+00 S7 3.3279E-05 -5.7138E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 4.1108E-04 -1.6832E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -7.0417E-04 8.3857E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 2.0024E-05 5.5295E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0104] Table 4-2

[0105] Exemplarily, as shown in Figure 7A Table 2-1, the optical imaging lens can further include at least one spacer disposed between lenses and in contact with the image side of the first lens. For example, a first spacer P1 disposed between the first lens and the second lens and in contact with the image side of the first lens, in this embodiment, the peripheral surface of the first spacer P1 is in contact with the image side of the first lens E1, see the partial schematic view in Figure 4B ; a second spacer P2 disposed between the second lens and the third lens and in contact with the image side of the second lens; a third spacer P3 disposed between the third lens and the fourth lens and in contact with the image side of the third lens; and a fourth spacer P4 disposed between the fourth lens and the fifth lens and in contact with the image side of the fourth lens.

[0106] Exemplarily, as shown in Figure 7B Table 2-2, the optical imaging lens can further include at least one spacer disposed between lenses and in contact with the image side of the first lens. For example, a first spacer P1 disposed between the first lens and the second lens and in contact with the image side of the first lens, in this embodiment, the peripheral surface of the first spacer P1 is in contact with the inner surface of the lens barrel P0, see the partial schematic view in Figure 4A ; a second spacer P2 disposed between the second lens and the third lens and in contact with the image side of the second lens; a third spacer P3 disposed on the image side of the third lens and in partial contact with the image side of the third lens, a spacer P3b disposed between the image side of the third spacer P3 and the object side of the fourth lens; and a fourth spacer P4 disposed between the fourth lens and the fifth lens and in contact with the image side of the fourth lens.

[0107] The values of the respective parameters in the embodiments 2-1 and 2-2 are shown in Table 9, respectively, wherein the meanings of the parameters are as described above and will not be repeated here, and the units of the parameters shown in Table 9 are millimeters (mm).

[0108] Figure 8A The axial chromatic aberration curve of the optical imaging lens of the embodiment 2 is shown, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the optical imaging lens of the embodiment 2 is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 8C The distortion curve of the optical imaging lens of the embodiment 2 is shown, which represents the distortion size values corresponding to different image heights. Figure 8D The magnification chromatic aberration curve of the optical imaging lens of the embodiment 2 is shown, which represents the deviation of the image heights on the imaging plane after the light rays pass through the lens. According to Figures 8A to 8DIt can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0109] Example 3

[0110] The following is for reference Figure 9A , Figure 9B as well as Figures 10A to 10D An optical imaging lens according to Embodiment 3 of this application is described. Figure 9A and Figure 9B Schematic diagrams of the optical imaging lens according to Embodiment 3 of this application are shown in two different embodiments.

[0111] like Figure 9A and Figure 9B As shown, the optical imaging lens includes a lens barrel P0 and, housed within the lens barrel P0, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 arranged sequentially along the optical axis from the object side to the image side.

[0112] 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 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 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 optical imaging lens may also include a filter E6, which may have an object-side surface S11 and an image-side surface S12 (not shown). The optical imaging lens may also include a protective glass E7, which may have an object-side surface S13 and an image-side surface S14 (not shown). The optical imaging lens may also include an imaging surface S15 (not shown), on which light from an object may pass sequentially through surfaces S1 to S14 and ultimately be imaged.

[0113] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 6-1 and 6-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S10 in Example 3. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30wherein each aspherical surface type can be defined by the formula (1) given in the above embodiment 1.

[0114]

[0115] Table 5

[0116]

[0117]

[0118] Table 6-1

[0119] Face number A18 A20 A22 A24 A26 A28 A30 S1 6.3570E-08 -7.6897E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -4.3169E-07 1.0386E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 2.3937E-06 -8.8577E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 2.6376E-06 -3.6773E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -3.2384E-05 -1.4934E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -8.6796E-06 -1.2749E-05 6.2584E-07 1.5780E-07 -4.8069E-06 0.0000E+00 0.0000E+00 S7 1.3405E-04 1.5508E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 2.5148E-04 1.5958E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -4.3505E-04 -1.6421E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 -5.6955E-05 5.5740E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0120] Table 6-2

[0121] Exemplarily, as shown in Figure 9A , according to embodiment 3-1, the optical imaging lens can further include at least one spacer disposed between lenses and in contact with the image side surface of the first lens. For example, a first spacer P1 disposed between the first lens and the second lens and in contact with the image side surface of the first lens, in this embodiment, the peripheral surface of the first spacer P1 is in contact with the partial surface of the image side of the first lens E1, the partial schematic view can be seen from Figure 4B ; a second spacer P2 disposed between the second lens and the third lens and in contact with the image side surface of the second lens; a third spacer P3 disposed between the third lens and the fourth lens and in contact with the image side surface of the third lens; and a fourth spacer P4 disposed between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens.

[0122] Exemplarily, as shown in Figure 9B , according to embodiment 3-2, the optical imaging lens can further include at least one spacer disposed between lenses and in contact with the image side surface of the first lens. For example, a first spacer P1 disposed between the first lens and the second lens and in contact with the image side surface of the first lens, in this embodiment, the peripheral surface of the first spacer P1 is in contact with the inner surface of the lens barrel P0, the partial schematic view can be seen from Figure 4A ; a second spacer P2 disposed between the second lens and the third lens and in contact with the image side surface of the second lens; a third spacer P3 disposed on the image side of the third lens and in partial contact with the image side surface of the third lens, a spacer P3b disposed between the image side surface of the third spacer P3 and the object side surface of the fourth lens; and a fourth spacer P4 disposed between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens.

[0123] The values of the related parameters in embodiments 3-1 and 3-2 are respectively shown in Table 9, wherein the meanings of the parameters are as described above, which will not be repeated here, and the units of the parameters shown in Table 9 are millimeters (mm).

[0124] Figure 10A Axial chromatic aberration curves of the optical imaging lens of Example 3 are shown, which represent the deviation of convergent focal points of light rays of different wavelengths after passing through the lens. Figure 10B Astigmatism curves of the optical imaging lens of Example 3 are shown, which represent the meridional image curvature and sagittal image curvature. Figure 10C Distortion curves of the optical imaging lens of Example 3 are shown, which represent the distortion size values corresponding to different image heights. Figure 10D Ratios of the optical imaging lens of Example 3 are shown, which represent the deviation of light rays on the imaging plane after passing through the lens. According to Figures 10A to 10D It can be known that the optical imaging lens given by Example 3 can achieve good imaging quality.

[0125] Example 4

[0126] An optical imaging lens according to Example 4 of the present application is described below with reference to Figure 11A , Figure 11B and Figures 12A to 12D . Figure 11A and Figure 11B respectively show the structural schematic diagrams of the optical imaging lens according to Example 4 of the present application in two different embodiments.

[0127] As shown in Figure 11A and Figure 11B , the optical imaging lens comprises a lens barrel P0 and, arranged in sequence along the optical axis from the object side to the image side and contained in the lens barrel P0, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5.

[0128] The first lens E1 has positive refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a convex surface. The second lens E2 has negative refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a concave surface. The third lens E3 has positive refractive power, the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface. The fourth lens E4 has positive refractive power, the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface. The fifth lens E5 has negative refractive power, the object side surface S9 is a convex surface, and the image side surface S10 is a concave surface. The optical imaging lens can further comprise a filter E6, which can have an object side surface S11 and an image side surface S12 (not shown). The optical imaging lens can further comprise a protective glass E7, which can have an object side surface S13 and an image side surface S14 (not shown). The optical imaging lens can further comprise an imaging surface S15 (not shown), and light from an object can pass through the surfaces S1 to S14 in sequence and finally be imaged on the imaging surface S15, for example.

[0129] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm). Tables 8-1 and 8-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical mirrors S1 to S10 in Example 8. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0130]

[0131] Table 7

[0132]

[0133]

[0134] Table 8-1

[0135] Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.4691E-07 -5.2480E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -7.2262E-07 6.5330E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.5987E-06 -9.1289E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 4.5140E-06 -2.7346E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 -3.1980E-05 3.3699E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.8060E-05 3.6862E-05 1.3490E-05 4.9798E-06 -2.5216E-06 0.0000E+00 0.0000E+00 S7 2.7460E-04 1.0773E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.6038E-04 -3.1056E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -1.8823E-04 -1.6639E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 2.2215E-04 3.6913E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0136] Table 8-2

[0137] For example, such as Figure 11A As shown, according to embodiment 4-1, the optical imaging lens may further include at least one spacer disposed between lenses and housed in the lens barrel P0. For example, a first spacer P1 is disposed between the first lens and the second lens and contacts the image-side surface of the first lens. In this embodiment, the outer peripheral surface of the first spacer P1 contacts a portion of the image-side surface of the first lens E1. A partial schematic diagram can be found in [reference needed]. Figure 4B The second spacer P2 is placed between the second lens and the third lens and in contact with the image side of the second lens; the third spacer P3 is placed between the third lens and the fourth lens and in contact with the image side of the third lens; and the fourth spacer P4 is placed between the fourth lens and the fifth lens and in contact with the image side of the fourth lens.

[0138] For example, such as Figure 11B As shown in Embodiment 4-2, the optical imaging lens may further include at least one spacer disposed between lenses and housed within the lens barrel P0. For example, a first spacer P1 is disposed between the first lens and the second lens and contacts the image-side surface of the first lens. In this embodiment, the outer peripheral surface of the first spacer P1 contacts the inner surface of the lens barrel P0. A partial schematic diagram can be found in [reference needed]. Figure 4Aa second spacer P2 disposed between the second lens and the third lens and in contact with an image-side surface of the second lens; a third spacer P3 disposed on an image-side of the third lens and in partial contact with an image-side surface of the third lens, a spacer P3b disposed between an image-side surface of the third spacer P3 and an object-side surface of the fourth lens; and a fourth spacer P4 disposed between the fourth lens and the fifth lens and in contact with an image-side surface of the fourth lens.

[0139] The values of the respective parameters in embodiments 4-1 and 4-2 are shown in Table 9, respectively, where the meanings of the parameters are as described above and will not be repeated here, and the units of the parameters shown in Table 9 are millimeters (mm).

[0140] Figure 12A The axial chromatic aberration curve of the optical imaging lens of embodiment 4 is shown, which represents the deviation of light rays of different wavelengths after converging through the lens. Figure 12B The astigmatism curve of the optical imaging lens of embodiment 4 is shown, which represents the meridional image curvature and sagittal image curvature. Figure 12C The distortion curve of the optical imaging lens of embodiment 4 is shown, which represents the distortion size values corresponding to different image heights. Figure 12D The lateral chromatic aberration curve of the optical imaging lens of embodiment 4 is shown, which represents the deviation of light rays on the imaging plane after converging through the lens. Figures 12A to 12D It can be seen that the optical imaging lens of embodiment 4 can achieve good imaging quality.

[0141]

[0142]

[0143] Table 9

[0144] In addition, in embodiments 1 to 4, the effective focal length values f1 to f5 of the respective lenses are shown in Table 10.

[0145] Parameter / Example 1 2 3 4 f1 (mm) 2.81 2.76 2.76 2.78 f2 (mm) -3.81 -3.82 -3.70 -3.57 f3 (mm) 9.23 8.60 6.46 5.65 f4 (mm) 1.15 1.14 1.15 1.13 f5 (mm) -1.11 -1.13 -1.17 -1.17

[0146] Table 10

[0147] Embodiments 1 to 4 respectively satisfy the conditions shown in Table 11.

[0148] Condition / Example 1-1 1-2 1-3 2-1 2-2 3-1 3-2 4-1 4-2 |(R7+EP34) / d4s| 1.69 1.78 1.67 1.16 1.17 0.59 0.58 0.57 0.56 |(R2-R1) / (D1s-d1s)| 6.35 12.84 6.46 10.02 5.05 10.12 4.93 9.59 4.79 |(f2+f3) / (EP23-CT3)| 62.17 62.17 42.02 115.27 67.00 28.58 11.53 23.32 8.96 f4 / (CP3+CP4) 7.84 4.21 7.89 31.64 5.86 32.07 7.18 31.27 6.99 T12 / CP1 1.39 1.39 2.08 3.74 3.74 8.58 8.58 8.64 8.64 (T23+CT2) / CP2 23.57 23.57 35.35 21.57 21.57 19.07 19.07 18.65 18.65 (CT1+CT4) / EP12 2.76 2.76 2.82 2.51 2.51 1.88 1.88 1.81 1.81 f3 / (CT2+T34+EP34) 7.66 8.34 7.80 8.10 8.46 6.75 6.63 5.99 5.88 |(D2m+D3s) / (R4+R5)| 1.73 1.73 1.69 1.30 1.26 1.35 1.27 1.49 1.41 |(D4m+D1m) / R7| 1.46 1.31 1.46 1.99 2.20 3.77 4.17 3.94 4.36 R9 / (D4s-d4s) 3.59 3.65 3.70 3.18 3.18 1.46 1.46 0.54 0.54 TD / (d3s-d2s) 5.90 5.90 5.83 5.73 3.28 7.88 4.07 9.09 3.81 |∑CT / (d4m-d3m)| 2.23 1.60 1.74 2.75 13.15 4.39 112.53 4.14 37.51

[0149] Table 11

[0150] The application also provides an imaging device provided with an electronic photosensitive element for imaging, which can be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device can be a separate imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0151] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. Those skilled in the art should understand that the scope of protection of the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by the mutual replacement of the above-described features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An optical imaging lens, characterized in that, It includes a lens barrel, a lens assembly housed within the lens barrel, and at least one spacer, wherein, The lens group comprises, sequentially from the object side to the image side along the optical axis: The first lens with positive optical power has a positive radius of curvature on the object side and a negative radius of curvature on the image side. A second lens with negative optical power; A third lens with positive optical power; A fourth lens with positive optical power has a negative radius of curvature on both its object-side and image-side surfaces; and A fifth lens with negative optical power; The at least one spacer includes: A third spacer located between the third lens and the fourth lens, the object-side side of which contacts the image-side side of the third lens; and A fourth spacer located between the fourth lens and the fifth lens, the object side of which contacts the image side of the fourth lens; The optical imaging lens has five lenses with optical power. The optical imaging lens satisfies: 0.56≤|(R7+EP34) / d4s|≤1.78, Wherein, R7 is the radius of curvature of the object side surface of the fourth lens, EP34 is the distance between the image side surface of the third spacer and the object side surface of the fourth spacer along the optical axis, and d4s is the inner diameter of the object side surface of the fourth spacer.

2. The optical imaging lens according to claim 1, characterized in that, The at least one spacer further includes: a first spacer located between the first lens and the second lens, wherein its object side contacts the image side of the first lens, its image side contacts the object side of the second lens, and its peripheral surface contacts the lens or the lens barrel.

3. The optical imaging lens according to claim 1, characterized in that, The maximum thickness CP3 of the third spacer satisfies: 0.018mm≤CP3≤0.2mm.

4. The optical imaging lens according to claim 1, wherein the at least one spacer further comprises: A first spacer located between the first lens and the second lens and in contact with the image-side surface of the first lens, characterized in that the air gap T12 between the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first spacer satisfy the following: 1.39≤T12 / CP1≤8.

64.

5. The optical imaging lens according to claim 1, wherein the at least one spacer further comprises: A second spacer located between the second lens and the third lens and in contact with the image-side surface of the second lens, characterized in that the air gap T23 between the second lens and the third lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the maximum thickness CP2 of the second spacer satisfy the following: 18.65≤(T23+CT2) / CP2≤35.

35.

6. The optical imaging lens according to claim 1, wherein the at least one spacer further comprises: A first spacer located between the first lens and the second lens and in contact with the image-side surface of the first lens, and a second spacer located between the second lens and the third lens and in contact with the image-side surface of the second lens, characterized in that the center thickness CT1 of the first lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the spacing distance EP12 between the image-side surface of the first spacer and the object-side surface of the second spacer along the optical axis direction satisfy: 1.81≤(CT1+CT4) / EP12≤2.

82.

7. The optical imaging lens according to claim 1, characterized in that, The effective focal length f3 of the third lens, the center thickness CT2 of the second lens on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the distance EP34 between the image side and the object side of the third spacer along the optical axis satisfy the following: 5.88≤f3 / (CT2+T34+EP34)<8.

5.

8. The optical imaging lens according to claim 1, wherein the at least one spacer further comprises: A second spacer located between the second lens and the third lens and in contact with the image-side surface of the second lens, characterized in that the outer diameter D2m of the image-side surface of the second spacer, the outer diameter D3s of the object-side surface of the third spacer, the radius of curvature R4 of the image-side surface of the second lens, and the radius of curvature R5 of the object-side surface of the third lens satisfy the following: 1.26≤|(D2m+D3s) / (R4+R5)|≤1.

73.

9. The optical imaging lens according to claim 1, wherein the at least one spacer further comprises: A first spacer located between the first lens and the second lens and in contact with the image-side surface of the first lens, characterized in that the outer diameter D4m of the image-side surface of the fourth spacer, the outer diameter D1m of the image-side surface of the first spacer, and the radius of curvature R7 of the object-side surface of the fourth lens satisfy the following: 1.31≤|(D4m+D1m) / R7|<4.

5.

10. The optical imaging lens according to any one of claims 1 to 9, characterized in that, The radius of curvature R9 of the object-side surface of the fifth lens, the outer diameter D4s of the object-side surface of the fourth spacer, and the inner diameter d4s of the object-side surface of the fourth spacer satisfy the following: 0.5 <R9 / (D4s-d4s)≤3.70。 11. The optical imaging lens according to any one of claims 1 to 9, wherein the at least one spacer further comprises: A second spacer located between the second lens and the third lens and in contact with the image-side surface of the second lens, characterized in that the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the spacing EP23 between the image-side surface of the second spacer and the object-side surface of the third spacer along the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy the following: 8.96≤|(f2+f3) / (EP23-CT3)|≤115.

27.

12. The optical imaging lens according to any one of claims 1 to 9, wherein the at least one spacer further comprises: A first spacer located between the first lens and the second lens and in contact with the image-side surface of the first lens, characterized in that the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R1 of the object-side surface of the first lens, the outer diameter D1s of the object-side surface of the first spacer, and the inner diameter d1s of the object-side surface of the first spacer satisfy the following: 4.79≤|(R2-R1) / (D1s-d1s)|≤12.

84.

13. The optical imaging lens according to any one of claims 1 to 9, characterized in that, The effective focal length f4 of the fourth lens, the maximum thickness CP3 of the third spacer, and the maximum thickness CP4 of the fourth spacer satisfy the following: 4.21≤f4 / (CP3+CP4)≤32.

07.

14. The optical imaging lens according to any one of claims 1 to 9, wherein the at least one spacer further comprises: A second spacer located between the second lens and the third lens and in contact with the image-side surface of the second lens, characterized in that the distance TD from the object-side surface of the first lens to the image-side surface of the fifth lens on the optical axis, the inner diameter d3s of the object-side surface of the third spacer, and the inner diameter d2s of the object-side surface of the second spacer satisfy the following: 3.28≤TD / (d3s-d2s)≤9.

09.

15. The optical imaging lens according to any one of claims 1 to 9, characterized in that, The sum of the center thicknesses of the first to the fifth lenses along the optical axis, ∑CT, the inner diameter d4m of the image-side surface of the fourth spacer, and the inner diameter d3m of the image-side surface of the third spacer satisfy the following: 1.60≤|∑CT / (d4m-d3m)|≤112.

53.

16. The optical imaging lens according to any one of claims 1 to 9, characterized in that, The maximum thickness CP4 of the fourth spacer satisfies: 0.018mm≤CP4≤0.3mm.

17. The optical imaging lens according to any one of claims 1 to 9, characterized in that, The inner surface of the fourth spacer is a Lambertian surface.

Images