CN216622821U

CN216622821U - Optical imaging lens

Info

Publication number: CN216622821U
Application number: CN202123095673.4U
Authority: CN
Inventors: 吴旭炯; 毛辰杰; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-05-27
Anticipated expiration: 2031-12-10

Abstract

The application discloses an optical imaging lens, the optical imaging lens includes from the object side to the image side along the optical axis in order: a first lens; a second lens; a third lens having a negative bending force; a fourth lens having a positive refractive power, an object side surface of which has a concave shape; a fifth lens having a negative refractive power, an object side surface of which has a concave shape; the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the optical imaging system meet the condition that TTL/f is less than or equal to 1.0. According to the optical imaging lens, on the basis of reducing lenses, the TTL and F focal length ratios of the lens are controlled, on one hand, the total length of the lens is not too long, and a camera module is light and thin; on the other hand, the focal length is as long as possible, the magnification ratio of the telephoto lens is met, and the long-focus magnification effect is achieved. Meanwhile, the imaging lens has good imaging quality and the sensitivity of the optical imaging lens is effectively reduced by reasonably distributing the bending force of the front lens group and the rear lens group.

Description

Optical imaging lens

Technical Field

The application belongs to the field of optical imaging systems, and particularly relates to an optical imaging lens consisting of five lenses.

Background

Along with the development of intelligent technology, camera module is applied to various different intelligent technology fields such as intelligent house, intelligent terminal, intelligent driving, intelligent manufacturing, and along with the continuous improvement of the quality of making a video recording, current technical environment demand has been can't be satisfied to single function of making a video recording, especially receives more and more attention to the use of focusing and focusing lens.

The longest focal length of the telephoto lens in the prior art can reach more than 1100 mm, namely, the telephoto lens can take a human panorama which is 1.8 m higher than the camera by 300 m, and can completely meet the technical requirements of application environments such as intelligent driving, intelligent manufacturing, intelligent home and the like, but is limited by the characteristics of the telephoto lens, the telephoto lenses on the market at present have the problems of more lenses, larger caliber and volume of the lens and the like, so that the telephoto lens needs to occupy more design space, and the telephoto lens cannot be endured when the functions of electronic products are highly intensive; meanwhile, the blurring effect in the shooting process is relatively general, most of the blurring effect is algorithm blurring, and the effect is not as natural as that of a lens.

Therefore, for above-mentioned problem, this application provides a big aperture telephoto lens, guarantees on the miniaturized basis of camera lens, and the actual shooting process not only can keep clear imaging ability to the object in a distance, and the blurring effect of camera lens shooting can obtain obviously promoting moreover.

SUMMERY OF THE UTILITY MODEL

This application aims at providing an optical imaging lens, guarantees on the miniaturized basis of camera lens, and the actual shooting process not only can keep clear imaging ability to the object in a distance, and the blurring effect of camera lens shooting can obtain obviously promoting moreover. In addition, enough imaging light rays can enter the optical system in night shooting, noise of imaging pictures is reduced, and a better imaging effect is obtained.

The present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising:

a first lens;

a second lens;

a third lens having a negative bending force;

a fourth lens having a positive refracting power, an object side of which has a concave shape;

a fifth lens element having a negative refracting power, an object side surface of which has a concave shape;

the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the optical imaging system meet the condition that TTL/f is less than or equal to 1.0.

According to an embodiment of the present application, an air interval T23 of the second lens and the third lens on the optical axis, an air interval T12 of the first lens and the second lens on the optical axis, and a center thickness CT2 of the second lens on the optical axis satisfy: 0.5 ≦ T23/(T12+ CT2) ≦ 2.0.

According to an embodiment of the present application, an air interval T34 of the third lens and the fourth lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis satisfy: 1.5 ≦ T34/(CT2+ CT3) ≦ 2.5.

According to one embodiment of the present application, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, a radius of curvature R8 of an image-side surface of the fourth lens, and a radius of curvature R9 of an object-side surface of the fifth lens satisfy: 3.0 ≦ f4/R8| + | f5/R9| ≦ 4.5.

According to one embodiment of the present application, the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1.5 ≦ (R7+ R8)/(R7-R8) ≦ 2.3.

According to an embodiment of the present application, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: 3.0 ≦ f/f4 ≦ 3.6.

According to one embodiment of the present application, the effective focal length f1 of the first lens and the radius of curvature of the object-side surface of the first lens, R1, satisfy: 0.5 ≦ f1/R1 ≦ 1.0.

According to an embodiment of the present application, a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfy: 0.5 ≦ f345/f123| ≦ 6.0.

According to an embodiment of the present application, a combined focal length f12 of the first lens and the second lens and a combined focal length f234 of the second lens, the third lens and the fourth lens satisfy: 2.0 ≦ f12/f234| ≦ 3.0.

According to an embodiment of the present application, an on-axis distance SAG41 between an intersection point of the fourth lens object-side surface and the optical axis to an effective radius vertex of the fourth lens object-side surface and an on-axis distance SAG42 between an intersection point of the fourth lens image-side surface and the optical axis to an effective radius vertex of the fourth lens image-side surface satisfy: 2.0 ≦ (SAG42+ SAG41)/(SAG42-SAG41) ≦ 3.5.

According to one embodiment of the present application, the on-axis distance TD between the object-side surface of the first lens and the image-side surface of the last lens and the distance SD between the stop and the image-side surface of the last lens satisfy: 1.0. ltoreq. TD/SD. ltoreq.1.5. The present application further provides an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising:

a first lens;

a second lens;

a third lens having a negative bending force;

the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the sum sigma CT of the central thicknesses of all the lenses on the optical axis satisfy the following conditions: 2.0 ≦ TTL/Σ CT ≦ 2.5.

According to one embodiment of the present application, the on-axis distance TD between the object-side surface of the first lens and the image-side surface of the last lens and the distance SD between the stop and the image-side surface of the last lens satisfy: 1.0. ltoreq. TD/SD. ltoreq.1.5.

The beneficial effect of this application:

the optical imaging lens provided by the application comprises a plurality of lenses, such as a first lens, a second lens and a third lens. On the basis of reducing the lenses, the ratio of TTL to F focal length of the lens is controlled, on one hand, the total length of the lens is not too long, the camera module is light and thin, and the appearance and the hand feeling of the mobile phone are ensured; on the other hand, the focal length is as long as possible, the magnification ratio of the telephoto lens is met, and the long-focus photographing magnification effect is achieved. Meanwhile, the imaging lens has good imaging quality and the sensitivity of the optical imaging lens is effectively reduced by reasonably distributing the bending force of the front lens group and the rear lens group.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a lens assembly according to an embodiment 1 of the present application;

fig. 2a to 2c are an axial chromatic aberration curve, an astigmatic curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens according to an embodiment 1 of the present application;

FIG. 3 is a schematic diagram illustrating a lens assembly according to embodiment 2 of the present application;

fig. 4a to 4c are an axial chromatic aberration curve, an astigmatic curve, and a chromatic aberration of magnification curve, respectively, in an optical imaging lens according to embodiment 2 of the present application;

FIG. 5 is a schematic diagram illustrating a lens assembly according to embodiment 3 of the present application;

fig. 6a to 6c are an axial chromatic aberration curve, an astigmatic curve, and a chromatic aberration of magnification curve, respectively, in an optical imaging lens according to an embodiment 3 of the present application;

FIG. 7 is a schematic diagram illustrating a lens assembly according to embodiment 4 of the present application;

fig. 8a to 8c are an axial chromatic aberration curve, an astigmatic curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens according to an embodiment 4 of the present application;

FIG. 9 is a schematic diagram illustrating a lens assembly structure of an optical imaging lens system according to embodiment 5 of the present application;

fig. 10a to 10c are an axial chromatic aberration curve, an astigmatic curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens according to an embodiment 5 of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

In the description of the present application, the paraxial region refers to a region near the optical axis. If the lens surface has a convex shape and the convex position is not defined, it means that the lens surface has a convex shape at least in the paraxial region. If the lens surface has a concave shape and the concave position is not defined, it means that the lens surface has a concave shape at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

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 will be further understood that terms, such as those 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.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. Features, principles and other aspects of the present application will be described in detail below with reference to the drawings and in conjunction with embodiments.

Exemplary embodiments

The optical imaging lens of the present application includes five lenses, and includes, in order from an object side to an image side along an optical axis: the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the lenses are independent from each other, and air spaces are formed between the lenses on an optical axis.

In the present exemplary embodiment, a first lens having a bending force; a second lens having a bending force; a third lens having a negative bending force; a fourth lens having a positive refracting power, an object side of which has a concave shape; the object side of the fifth lens having negative bending force has a concave shape.

The on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the optical imaging system meet the condition that TTL/f is less than or equal to 1.0. The ratio of TTL to F focal length of the lens is controlled, on one hand, the total lens length is not too long, the camera module is light and thin, and the appearance and the hand feeling of the mobile phone are ensured; on the other hand, the focal length is as long as possible, the magnification ratio of the telephoto lens is met, and the long-focus magnification effect is achieved. More specifically, the on-axis distance TTL from the object-side surface of the first lens element to the imaging surface and the effective focal length f of the optical imaging system satisfy: TTL/f is more than or equal to 0.90 and less than or equal to 1.00.

The on-axis distance TTL from the object side surface of the first lens to the imaging surface and the sum sigma CT of the central thicknesses of all the lenses on the optical axis satisfy the following conditions: 2.0 ≦ TTL/Σ CT ≦ 2.5. By controlling the sum of the thicknesses of all lenses in the optical imaging system, the distortion range of the system can be reasonably controlled, so that the system has smaller distortion. More specifically, the on-axis distance TTL from the object-side surface of the first lens element to the imaging surface and the sum Σ CT of the central thicknesses of all the lens elements on the optical axis satisfy: 2.01 ≦ TTL/Σ CT ≦ 2.49.

In an exemplary embodiment of the present application, an air interval T23 of the second lens and the third lens on the optical axis, an air interval T12 of the first lens and the second lens on the optical axis, and a center thickness CT2 of the second lens on the optical axis satisfy: 0.5 ≦ T23/(T12+ CT2) ≦ 2.0. The air space of the second lens and the third lens on the optical axis and the ratio of the first lens gap to the second lens thickness are restricted to be in a certain range, so that the performance of the field curvature of the system can be reasonably controlled, and the aberration of the system in an off-axis field of view is small. More specifically, an air interval T23 between the second lens and the third lens on the optical axis, an air interval T12 between the first lens and the second lens on the optical axis, and a center thickness CT2 of the second lens on the optical axis satisfy: 0.51 ≦ T23/(T12+ CT2) ≦ 1.99.

In an exemplary embodiment of the present application, an air interval T34 of the third lens and the fourth lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis satisfy: 1.5 ≦ T34/(CT2+ CT3) ≦ 2.5. By reasonably adjusting the air gap between the third lens and the fourth lens and the middle thickness of the second third lens, the risk of ghost images of the third lens and the fourth lens can be effectively reduced, and the size compression of the shooting lens group is facilitated. More specifically, an air interval T34 of the third lens and the fourth lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and a center thickness CT3 of the third lens on the optical axis satisfy: 1.51 ≦ T34/(CT2+ CT3) ≦ 2.49.

In an exemplary embodiment of the present application, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, a radius of curvature R8 of an image-side surface of the fourth lens, and a radius of curvature R9 of an object-side surface of the fifth lens satisfy: 3.0 ≦ f4/R8| + | f5/R9| ≦ 4.5. By restricting the sum of the ratio of the focal length to the curvature of the fourth lens and the fifth lens, the emergent angle of incident light is reduced, the incident angle of the chief ray of the lens on a chip is reduced, and the color cast risk is reduced. More specifically, the effective focal length f4 of the fourth lens element, the effective focal length f5 of the fifth lens element, the radius of curvature R8 of the image-side surface of the fourth lens element, and the radius of curvature R9 of the object-side surface of the fifth lens element satisfy: 3.01 ≦ f4/R8| + | f5/R9| ≦ 4.49.

In an exemplary embodiment of the present application, a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1.5 ≦ (R7+ R8)/(R7-R8) ≦ 2.3. The ratio of the sum of the difference of the curvature radiuses of the object side and the image side of the third lens is restricted within a certain range, so that the coma of an on-axis view field and an off-axis view field is small, and the imaging system has good imaging quality. More specifically, a radius of curvature R7 of the object-side surface of the fourth lens element and a radius of curvature R8 of the image-side surface of the fourth lens element satisfy: 1.51 ≦ (R7+ R8)/(R7-R8) ≦ 2.28.

In the exemplary embodiment of the present application, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: 3.0 ≦ f/f4 ≦ 3.6. By reasonably controlling the range of the effective focal length of the fourth lens, the contribution rate of the bending force of the fourth lens can be reasonably controlled, and the high-grade spherical aberration generated by the imaging system is balanced. More specifically, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: 3.01 ≦ f/f4 ≦ 3.59.

In the exemplary embodiment of the present application, the effective focal length f1 of the first lens and the radius of curvature of the object-side surface of the first lens, R1, satisfy: 0.5 ≦ f1/R1 ≦ 1.0. By restricting the focal length and the curvature of the object side of the first lens, the incident angle is smaller, and the characteristics of a long-focus system are met. More specifically, the effective focal length f1 of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy: 0.51 ≦ f1/R1 ≦ 1.0.

In an exemplary embodiment of the present application, a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfy: 0.5 ≦ f345/f123| ≦ 6.0. By reasonably distributing the bending force of the front lens group and the rear lens group, the system has good imaging quality and the sensitivity of the system is effectively reduced. More specifically, a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfy: 0.51 ≦ f345/f123| ≦ 5.99.

In the exemplary embodiment of the present application, a combined focal length f12 of the first lens and the second lens and a combined focal length f234 of the second lens, the third lens and the fourth lens satisfy: 2.0 ≦ f12/f234| ≦ 3.0. The ratio of the combined focal length of the first and second lenses to the combined focal length of the first and third lenses is restricted, so that light rays entering the first and second lenses can be reasonably reduced, and the sensitivity of the front group of lenses is reduced. More specifically, a combined focal length f12 of the first lens and the second lens and a combined focal length f234 of the second lens, the third lens and the fourth lens satisfy: 2.01 ≦ f12/f234| ≦ 2.99.

In the exemplary embodiment of the present application, an on-axis distance SAG41 between an intersection point of the fourth lens object-side surface and the optical axis and an effective radius vertex of the fourth lens object-side surface and an on-axis distance SAG42 between an intersection point of the fourth lens image-side surface and the optical axis and an effective radius vertex of the fourth lens image-side surface satisfy: 2.0 ≦ (SAG42+ SAG41)/(SAG42-SAG41) ≦ 3.5. The aperture of the lens is reduced and the assembling stability is improved by restricting the rise relation of the two surfaces of the fourth lens. More specifically, an on-axis distance SAG41 between an intersection point of the fourth lens object-side surface and the optical axis and an effective radius vertex of the fourth lens object-side surface and an on-axis distance SAG42 between an intersection point of the fourth lens image-side surface and the optical axis and an effective radius vertex of the fourth lens image-side surface satisfy: 2.01 ≦ (SAG42+ SAG41)/(SAG42-SAG41) ≦ 3.49.

In an exemplary embodiment of the present application, an on-axis distance TD between the object-side surface of the first lens and the image-side surface of the last lens and a distance SD between the stop and the image-side surface of the last lens satisfy: 1.0. ltoreq. TD/SD. ltoreq.1.5. Through restricting the distance from the diaphragm and the first lens to the last lens mirror image measuring surface, the difference of the ratio of the two is greatly beneficial to improving the illumination of the system and improving the imaging quality. More specifically, an on-axis distance TD from the object-side surface of the first lens to the image-side surface of the last lens and a distance SD from the diaphragm to the image-side surface of the last lens satisfy: 1.01 ≦ TD/SD ≦ 1.49.

In the present exemplary embodiment, the object-side surface and the image-side surface of any one of the first lens E1 through the fifth lens E5 are aspheric, and the profile x of each aspheric lens can be defined using, but not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface.

In the present exemplary embodiment, the above-described optical imaging lens may further include a diaphragm. The stop may be disposed at an appropriate position as needed, for example, the stop may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above-described five lenses. The optical imaging lens has the advantages of being small in size and size, wide in imaging range and high in imaging quality, and the ultrathin property of the mobile phone is guaranteed by reasonably distributing the bending force and the surface shape of each lens, the center thickness of each lens, the distance between the lenses on the shaft and the like.

In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the fifth lens is an aspheric mirror surface. The aspheric lens is characterized in that: the aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and astigmatic aberration, unlike a spherical lens having a constant curvature from the lens center to the lens periphery, in which the curvature is continuously varied from the lens center to the lens periphery. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspheric mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens and the fifth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five lenses, and may include other numbers of lenses if necessary.

Specific embodiments of an optical imaging lens suitable for the above-described embodiments are further described below with reference to the drawings.

Detailed description of the preferred embodiment 1

Fig. 1 is a schematic view of a lens assembly according to embodiment 1 of the present disclosure, in which the optical imaging lens includes, in order from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

The first lens element E1 has a positive bending force, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens E2 has a negative bending force, and its object side S3 has a concave shape and its image side S4 has a concave shape. The third lens E3 has a negative bending force, and its object side S5 has a concave shape and its image side S6 has a convex shape. The fourth lens element E4 has a positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens E5 has a negative bending force, and its object side S9 has a concave shape and its image side S10 has a concave shape. Filter E6 has an object side S11 and an image side S12. Light from the object sequentially passes through each of the surfaces S1 to S12 and is finally imaged on the imaging surface S13.

As shown in table 1, a basic parameter table of the optical imaging lens of embodiment 1 is shown, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm).

TABLE 1

As shown in table 2, in embodiment 1, the total effective focal length f of the optical imaging lens is 4.91mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the optical imaging lens imaging surface S13 is 4.77mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 2.19 mm.

TABLE 2

The optical imaging lens in embodiment 1 satisfies:

and TTL/f is 0.97, where TTL is an on-axis distance from the object-side surface of the first lens element to the imaging surface, and f is an effective focal length of the optical imaging system.

TTL/Σ CT is 2.18, where TTL is the on-axis distance from the object-side surface of the first lens to the image plane, and Σ CT is the sum of the central thicknesses of all lenses on the optical axis.

T23/(T12+ CT2) ═ 0.96, where T23 is the air space on the optical axis between the second lens and the third lens, T12 is the air space on the optical axis between the first lens and the second lens, and CT2 is the center thickness of the second lens on the optical axis.

T34/(CT2+ CT3) ═ 2.18, where T34 is the air space on the optical axis between the third lens and the fourth lens, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

And l f4/R8 l + | f5/R9 l is 3.78, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R8 is the curvature radius of the image side surface of the fourth lens, and R9 is the curvature radius of the object side surface of the fifth lens.

(R7+ R8)/(R7-R8) ═ 1.84, where R7 is the radius of curvature of the object-side surface of the fourth lens and R8 is the radius of curvature of the image-side surface of the fourth lens.

And f/f4 is 3.53, wherein f is the effective focal length of the optical imaging system, and f4 is the effective focal length of the fourth lens.

f1/R1 is 1.70, wherein f1 is the effective focal length of the first lens, and R1 is the radius of curvature of the object side surface of the first lens.

And | f345/f123| -1.29, wherein f123 is the combined focal length of the first lens, the second lens and the third lens, and f345 is the combined focal length of the third lens, the fourth lens and the fifth lens.

And | f12/f234| -2.84, wherein f12 is the combined focal length of the first lens and the second lens, and f234 is the combined focal length of the second lens, the third lens and the fourth lens.

(SAG42+ SAG41)/(SAG42-SAG41) ═ 2.65, where SAG41 is the on-axis distance between the intersection of the fourth lens object-side surface and the optical axis and the effective radius vertex of the fourth lens object-side surface, and SAG42 is the on-axis distance between the intersection of the fourth lens image-side surface and the optical axis and the effective radius vertex of the fourth lens image-side surface.

And TD/SD is 1.14, wherein TD is the on-axis distance from the object side surface of the first lens to the image side surface of the last lens, and SD is the distance from the diaphragm to the image side surface of the last lens.

In example 1, the object-side surface and the image-side surface of any one of the first lens element E1 through the fifth lens element E5 are aspheric, and table 3 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for the respective aspheric mirror surfaces S1 to S10 in example 1.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.3850E-02

-2.9532E-01

3.2631E+00

-2.2800E+01

1.0655E+02

-3.4549E+02

7.9602E+02

S2

-1.0291E-03

1.5267E-01

-1.1735E+00

8.0665E+00

-3.9629E+01

1.3732E+02

-3.4298E+02

S3

-2.0735E-01

2.3679E-03

6.2848E+00

-6.8073E+01

4.6125E+02

-2.1825E+03

7.4322E+03

S4

-3.5835E-01

1.9735E+00

-3.9561E+01

5.7852E+02

-5.5522E+03

3.6534E+04

-1.6993E+05

S5

1.5213E-01

-1.8783E-01

8.2142E+00

-5.7315E+01

7.7553E+00

3.2432E+03

-3.0595E+04

S6

2.9108E-01

1.7133E+00

-3.4055E+01

5.0462E+02

-4.7768E+03

3.0568E+04

-1.3708E+05

S7

7.3357E-02

5.4511E-01

-5.0049E+00

2.1798E+01

-6.3114E+01

1.3048E+02

-1.9684E+02

S8

2.2124E+00

-5.2950E+00

-4.7100E-01

4.0068E+01

-1.3243E+02

2.4823E+02

-3.1148E+02

S9

3.7482E+00

-1.3949E+01

3.1699E+01

-5.1480E+01

6.3097E+01

-5.8462E+01

4.0344E+01

S10

5.8948E-01

-2.7513E+00

6.3856E+00

-1.0626E+01

1.3573E+01

-1.3308E+01

9.8845E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-1.3198E+03

1.5780E+03

-1.3470E+03

7.9998E+02

-3.1377E+02

7.3001E+01

-7.6225E+00

S2

6.2623E+02

-8.3743E+02

8.1082E+02

-5.5256E+02

2.5089E+02

-6.7986E+01

8.2993E+00

S3

-1.8393E+04

3.3014E+04

-4.2410E+04

3.7899E+04

-2.2322E+04

7.7736E+03

-1.2104E+03

S4

5.6781E+05

-1.3684E+06

2.3574E+06

-2.8308E+06

2.2498E+06

-1.0634E+06

2.2621E+05

S5

1.5718E+05

-5.2235E+05

1.1708E+06

-1.7635E+06

1.7142E+06

-9.7242E+05

2.4463E+05

S6

4.3876E+05

-1.0074E+06

1.6457E+06

-1.8663E+06

1.3956E+06

-6.1852E+05

1.2298E+05

S7

2.1734E+02

-1.7450E+02

1.0028E+02

-4.0036E+01

1.0515E+01

-1.6294E+00

1.1267E-01

S8

2.7466E+02

-1.7265E+02

7.6991E+01

-2.3785E+01

4.8376E+00

-5.8216E-01

3.1380E-02

S9

-2.0417E+01

7.4577E+00

-1.9225E+00

3.3696E-01

-3.7537E-02

2.3247E-03

-5.7029E-05

S10

-5.4935E+00

2.2552E+00

-6.7117E-01

1.4037E-01

-1.9517E-02

1.6172E-03

-6.0348E-05

TABLE 3

Fig. 2a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2c shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 2a to 2c, the optical imaging lens system of embodiment 1 can achieve good imaging quality.

Specific example 2

Fig. 3 is a schematic view of a lens assembly according to embodiment 2 of the present application, in order from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

The first lens E1 has a positive bending force, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens E2 has a negative bending force, and its object side S3 has a concave shape and its image side S4 has a convex shape. The third lens E3 has a negative bending force, and its object side S5 has a concave shape and its image side S6 has a convex shape. The fourth lens element E4 has a positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens E5 has a negative bending force, and its object side S9 has a concave shape and its image side S10 has a concave shape. Filter E6 has an object side S11 and an image side S12. Light from the object sequentially passes through each of the surfaces S1 to S12 and is finally imaged on the imaging surface S13.

As shown in table 4, the basic parameter table of the optical imaging lens of embodiment 2 is shown, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm).

TABLE 4

As shown in table 5, in embodiment 2, the total effective focal length f of the optical imaging lens is 4.85mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the optical imaging lens imaging surface S13 is 4.83mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 2.19 mm.

TABLE 5

The optical imaging lens in embodiment 2 satisfies:

and TTL/f is 1.00, wherein TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and f is the effective focal length of the optical imaging system.

TTL/Σ CT is 2.13, where TTL is the on-axis distance from the object-side surface of the first lens to the image plane, and Σ CT is the sum of the central thicknesses of all lenses on the optical axis.

T23/(T12+ CT2) ═ 0.95, where T23 is the air space on the optical axis between the second lens and the third lens, T12 is the air space on the optical axis between the first lens and the second lens, and CT2 is the center thickness of the second lens on the optical axis.

T34/(CT2+ CT3) ═ 1.88, where T34 is the air space on the optical axis between the third lens and the fourth lens, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

And l f4/R8 l + | f5/R9 l is 3.54, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R8 is the curvature radius of the image side surface of the fourth lens, and R9 is the curvature radius of the object side surface of the fifth lens.

(R7+ R8)/(R7-R8) ═ 1.64, where R7 is the radius of curvature of the object-side surface of the fourth lens and R8 is the radius of curvature of the image-side surface of the fourth lens.

f/f4 is 3.09, where f is the effective focal length of the optical imaging system, and f4 is the effective focal length of the fourth lens.

f1/R1 is 1.88, wherein f1 is the effective focal length of the first lens, and R1 is the curvature radius of the object side surface of the first lens.

And | f345/f123|, is 0.80, wherein f123 is the combined focal length of the first lens, the second lens and the third lens, and f345 is the combined focal length of the third lens, the fourth lens and the fifth lens.

And | f12/f234| ═ 2.08, where f12 is the combined focal length of the first lens and the second lens, and f234 is the combined focal length of the second lens, the third lens and the fourth lens.

(SAG42+ SAG41)/(SAG42-SAG41) ═ 2.24, where SAG41 is the on-axis distance between the intersection of the fourth lens object-side surface and the optical axis and the effective radius vertex of the fourth lens object-side surface, and SAG42 is the on-axis distance between the intersection of the fourth lens image-side surface and the optical axis and the effective radius vertex of the fourth lens image-side surface.

And TD/SD is 1.09, wherein TD is the on-axis distance from the object side surface of the first lens to the image side surface of the last lens, and SD is the distance from the diaphragm to the image side surface of the last lens.

In example 2, the object-side surface and the image-side surface of any one of the first lens element E1 through the fifth lens element E5 are aspheric, and table 6 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for the respective aspheric mirror surfaces S1 to S10 in example 2.

TABLE 6

Fig. 4a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4c shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4a to 4c, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Specific example 3

Fig. 5 is a lens assembly structure of an optical imaging lens system according to embodiment 3 of the present application, which, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

The first lens element E1 has a positive bending force, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens E2 has a negative optical bending force, and its object side S3 has a convex shape and its image side S4 has a concave shape. The third lens E3 has a negative bending force, and its object side S5 has a convex shape and its image side S6 has a concave shape. The fourth lens element E4 has a positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens E5 has a negative optical bending force, and its object side surface S9 has a concave shape and its image side surface S10 has a convex shape. Filter E6 has an object side S11 and an image side S12. Light from the object sequentially passes through each of the surfaces S1 to S12 and is finally imaged on the imaging surface S13.

As shown in table 7, the basic parameter tables of the optical imaging lens of example 3 are shown, in which the units of the curvature radius, the thickness, and the focal length are millimeters (mm).

TABLE 7

As shown in table 8, in embodiment 3, the total effective focal length f of the optical imaging lens is 4.87mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the optical imaging lens imaging surface S13 is 4.78mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 2.19 mm.

TABLE 8

The optical imaging lens in embodiment 3 satisfies:

and the TTL/f is 0.98, wherein the TTL is the on-axis distance from the object side surface of the first lens to the imaging surface, and f is the effective focal length of the optical imaging system.

TTL/Σ CT is 1.98, where TTL is the on-axis distance from the object-side surface of the first lens to the imaging surface, and Σ CT is the sum of the central thicknesses of all lenses on the optical axis.

T23/(T12+ CT2) ═ 0.69, where T23 is the air space on the optical axis between the second lens and the third lens, T12 is the air space on the optical axis between the first lens and the second lens, and CT2 is the center thickness of the second lens on the optical axis.

T34/(CT2+ CT3) ═ 1.75, where T34 is the air space on the optical axis between the third lens and the fourth lens, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

And | f4/R8| + | f5/R9| ═ 3.98, wherein f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, R8 is a radius of curvature of an image side surface of the fourth lens, and R9 is a radius of curvature of an object side surface of the fifth lens.

(R7+ R8)/(R7-R8) is 1.90, where R7 is the radius of curvature of the object-side surface of the fourth lens and R8 is the radius of curvature of the image-side surface of the fourth lens.

f/f4 is 3.45, where f is the effective focal length of the optical imaging system, and f4 is the effective focal length of the fourth lens.

f1/R1 is 1.77, wherein f1 is the effective focal length of the first lens, and R1 is the radius of curvature of the object side surface of the first lens.

And | f345/f123| -3.19, wherein f123 is the combined focal length of the first lens, the second lens and the third lens, and f345 is the combined focal length of the third lens, the fourth lens and the fifth lens.

And | f12/f234| ═ 2.95, where f12 is the combined focal length of the first lens and the second lens, and f234 is the combined focal length of the second lens, the third lens and the fourth lens.

(SAG42+ SAG41)/(SAG42-SAG41) ═ 2.71, where SAG41 is the on-axis distance between the intersection of the fourth lens object-side surface and the optical axis and the effective radius vertex of the fourth lens object-side surface, and SAG42 is the on-axis distance between the intersection of the fourth lens image-side surface and the optical axis and the effective radius vertex of the fourth lens image-side surface.

And TD/SD is 1.18, wherein TD is the on-axis distance from the object side surface of the first lens to the image side surface of the last lens, and SD is the distance from the diaphragm to the image side surface of the last lens.

In example 3, the object-side surface and the image-side surface of any one of the first lens element E1 to the fifth lens element E5 are aspheric, and table 9 shows high-order coefficient values a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for the respective aspheric mirror surfaces S1 to S10 in example 3.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

1.3231E-03

-2.0629E-02

3.2389E-01

-2.7835E+00

1.4477E+01

-4.9208E+01

1.1442E+02

S2

-4.5756E-02

5.0463E-01

-1.4541E+00

-9.6430E-01

3.1640E+01

-1.6488E+02

5.0366E+02

S3

-4.8218E-01

8.7950E-01

5.4576E+00

-9.7569E+01

7.9392E+02

-4.2066E+03

1.5522E+04

S4

-5.8880E-01

1.2564E+00

-4.3083E+00

1.2048E+02

-2.1789E+03

2.2626E+04

-1.5054E+05

S5

2.0996E-01

-9.5723E-01

2.8497E+01

-4.2693E+02

4.2663E+03

-2.9764E+04

1.4830E+05

S6

3.2415E-01

-9.0735E-01

2.3453E+01

-3.2713E+02

3.0996E+03

-2.0654E+04

9.8423E+04

S7

3.9393E-02

2.5766E-03

-8.2319E-01

2.6697E+00

-2.4760E+00

-4.5307E+00

1.5566E+01

S8

2.4936E+00

-8.6003E+00

1.7457E+01

-2.0485E+01

5.3863E+00

2.8919E+01

-6.1579E+01

S9

3.5576E+00

-1.4227E+01

3.8070E+01

-7.7267E+01

1.2088E+02

-1.4265E+02

1.2469E+02

S10

2.6126E-01

-1.1404E+00

2.5411E+00

-4.1922E+00

5.1923E+00

-4.7698E+00

3.2369E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-1.8680E+02

2.1651E+02

-1.7758E+02

1.0096E+02

-3.7928E+01

8.4891E+00

-8.5920E-01

S2

-1.0310E+03

1.4669E+03

-1.4563E+03

9.8954E+02

-4.3854E+02

1.1414E+02

-1.3225E+01

S3

-4.0818E+04

7.6914E+04

-1.0298E+05

9.5556E+04

-5.8374E+04

2.1103E+04

-3.4195E+03

S4

6.7809E+05

-2.1162E+06

4.5828E+06

-6.7558E+06

6.4617E+06

-3.6105E+06

8.9294E+05

S5

-5.3299E+05

1.3811E+06

-2.5501E+06

3.2655E+06

-2.7508E+06

1.3687E+06

-3.0442E+05

S6

-3.3799E+05

8.3524E+05

-1.4675E+06

1.7840E+06

-1.4231E+06

6.6888E+05

-1.4013E+05

S7

-2.0203E+01

1.4797E+01

-6.4683E+00

1.5948E+00

-1.6487E-01

-8.8709E-03

2.5472E-03

S8

6.7970E+01

-4.8188E+01

2.2959E+01

-7.3298E+00

1.5068E+00

-1.8053E-01

9.5899E-03

S9

-7.9932E+01

3.7269E+01

-1.2464E+01

2.9099E+00

-4.5015E-01

4.1456E-02

-1.7205E-03

S10

-1.6242E+00

6.0134E-01

-1.6249E-01

3.1216E-02

-4.0439E-03

3.1672E-04

-1.1318E-05

TABLE 9

Fig. 6a shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 3, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6c shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6a to 6c, the optical imaging lens according to embodiment 3 can achieve good imaging quality.

Specific example 4

Fig. 7 is a lens assembly structure of an optical imaging lens system according to embodiment 4 of the present application, which, in order from an object side to an image side along an optical axis, includes: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

The first lens element E1 has a positive bending force, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens E2 has a negative refractive power, and its object side S3 has a convex shape and its image side S4 has a concave shape. The third lens E3 has a negative bending force, and its object side S5 has a concave shape and its image side S6 has a concave shape. The fourth lens element E4 has a positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens E5 has a negative bending force, and its object side S9 has a concave shape and its image side S10 has a convex shape. Filter E6 has an object side S11 and an image side S12. Light from the object sequentially passes through each of the surfaces S1 to S12 and is finally imaged on the imaging surface S13.

As shown in table 10, the basic parameter table of the optical imaging lens of embodiment 4 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Watch 10

As shown in table 11, in embodiment 4, the total effective focal length f of the optical imaging lens is 4.88mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the optical imaging lens imaging surface S13 is 4.87mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 2.19 mm.

TABLE 11

The optical imaging lens in embodiment 4 satisfies:

TTL/Σ CT is 2.06, where TTL is the on-axis distance from the object-side surface of the first lens to the image plane, and Σ CT is the sum of the central thicknesses of all lenses on the optical axis.

T23/(T12+ CT2) ═ 0.75, where T23 is the air space on the optical axis between the second lens and the third lens, T12 is the air space on the optical axis between the first lens and the second lens, and CT2 is the center thickness of the second lens on the optical axis.

T34/(CT2+ CT3) ═ 1.73, where T34 is the air space on the optical axis between the third lens and the fourth lens, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

(R7+ R8)/(R7-R8) ═ 1.82, where R7 is the radius of curvature of the object-side surface of the fourth lens and R8 is the radius of curvature of the image-side surface of the fourth lens.

f/f4 is 3.20, where f is the effective focal length of the optical imaging system, and f4 is the effective focal length of the fourth lens.

f1/R1 is 1.71, wherein f1 is the effective focal length of the first lens, and R1 is the curvature radius of the object side surface of the first lens.

And | f345/f123| -1.45, wherein f123 is the combined focal length of the first lens, the second lens and the third lens, and f345 is the combined focal length of the third lens, the fourth lens and the fifth lens.

And | f12/f234| ═ 2.06, wherein f12 is the combined focal length of the first lens and the second lens, and f234 is the combined focal length of the second lens, the third lens and the fourth lens.

(SAG42+ SAG41)/(SAG42-SAG41) ═ 2.55, where SAG41 is the on-axis distance between the intersection of the fourth lens object-side surface and the optical axis and the effective radius vertex of the fourth lens object-side surface, and SAG42 is the on-axis distance between the intersection of the fourth lens image-side surface and the optical axis and the effective radius vertex of the fourth lens image-side surface.

And TD/SD is 1.17, wherein TD is the on-axis distance from the object side surface of the first lens to the image side surface of the last lens, and SD is the distance from the diaphragm to the image side surface of the last lens.

In example 4, the object-side surface and the image-side surface of any one of the first lens element E1 to the fifth lens element E5 are aspheric, and table 12 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for the respective aspheric mirror surfaces S1 to S10 in example 4.

TABLE 12

Fig. 8a shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8c shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8a to 8c, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Specific example 5

Fig. 9 is a lens assembly structure of the optical imaging lens system of embodiment 5 of the present application, in order from an object side to an image side along an optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13.

The first lens E1 has a positive bending force, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens E2 has a positive bending force, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens E3 has a negative bending force, and its object side S5 has a concave shape and its image side S6 has a convex shape. The fourth lens element E4 has a positive refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens E5 has a negative bending force, and its object side S9 has a concave shape and its image side S10 has a convex shape. Filter E6 has an object side S11 and an image side S12. Light from the object sequentially passes through each of the surfaces S1 to S12 and is finally imaged on the imaging surface S13.

As shown in table 13, the basic parameter table of the optical imaging lens of example 5 is shown, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm).

Watch 13

As shown in table 14, in embodiment 5, the total effective focal length f of the optical imaging lens is 4.85mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the optical imaging lens imaging surface S13 is 4.80mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 is 2.19 mm.

TABLE 14

The optical imaging lens in embodiment 5 satisfies:

and the TTL/f is 0.99, where TTL is an on-axis distance from the object-side surface of the first lens element to the imaging surface, and f is an effective focal length of the optical imaging system.

TTL/Σ CT is 2.33, where TTL is the on-axis distance from the object-side surface of the first lens to the image plane, and Σ CT is the sum of the central thicknesses of all lenses on the optical axis.

T23/(T12+ CT2) ═ 1.75, where T23 is the air space on the optical axis between the second lens and the third lens, T12 is the air space on the optical axis between the first lens and the second lens, and CT2 is the center thickness of the second lens on the optical axis.

T34/(CT2+ CT3) ═ 2.46, where T34 is the air space on the optical axis between the third lens and the fourth lens, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

And | f4/R8| + | f5/R9| ═ 3.97, wherein f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, R8 is a radius of curvature of an image side surface of the fourth lens, and R9 is a radius of curvature of an object side surface of the fifth lens.

(R7+ R8)/(R7-R8) ═ 2.16, where R7 is the radius of curvature of the object-side surface of the fourth lens and R8 is the radius of curvature of the image-side surface of the fourth lens.

And f/f4 is 3.54, wherein f is the effective focal length of the optical imaging system, and f4 is the effective focal length of the fourth lens.

f1/R1 is 2.79, wherein f1 is the effective focal length of the first lens, and R1 is the curvature radius of the object side surface of the first lens.

And | f345/f123| -1.59, wherein f123 is the combined focal length of the first lens, the second lens and the third lens, and f345 is the combined focal length of the third lens, the fourth lens and the fifth lens.

And | f12/f234| -2.46, wherein f12 is the combined focal length of the first lens and the second lens, and f234 is the combined focal length of the second lens, the third lens and the fourth lens.

(SAG42+ SAG41)/(SAG42-SAG41) ═ 3.25, where SAG41 is the on-axis distance between the intersection of the fourth lens object-side surface and the optical axis and the effective radius vertex of the fourth lens object-side surface, and SAG42 is the on-axis distance between the intersection of the fourth lens image-side surface and the optical axis and the effective radius vertex of the fourth lens image-side surface.

And TD/SD is 1.13, wherein TD is the on-axis distance from the object side surface of the first lens to the image side surface of the last lens, and SD is the distance from the diaphragm to the image side surface of the last lens.

In example 5, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are both aspheric, and table 15 shows the high-order term coefficients a4, A6, A8, a10, a12, a14, a16, a18, a20, a22, a24, a26, a28, and a30 that can be used for the respective aspheric mirrors S1 to S10 in example 5.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-8.5735E-03

2.6237E-01

-2.5966E+00

1.5961E+01

-6.5332E+01

1.8543E+02

-3.7310E+02

S2

-7.9333E-01

3.6642E+00

-7.3954E+00

-3.2072E+01

3.5550E+02

-1.6597E+03

5.0043E+03

S3

-7.9742E-01

7.7195E-01

4.0215E+01

-6.2920E+02

5.4919E+03

-3.1931E+04

1.2974E+05

S4

-1.0180E-01

-4.7187E+00

1.1665E+02

-1.7833E+03

1.8312E+04

-1.3030E+05

6.5748E+05

S5

2.1529E-01

3.1035E+00

-7.5792E+01

1.2089E+03

-1.2822E+04

9.3816E+04

-4.8552E+05

S6

3.3034E-01

-3.5519E-02

4.6420E+00

-7.0546E+01

7.0529E+02

-4.8895E+03

2.3901E+04

S7

1.8976E-01

6.8266E-01

-5.8348E+00

2.2013E+01

-5.2735E+01

8.7465E+01

-1.0428E+02

S8

2.0688E+00

-4.3214E+00

1.6915E+00

1.5005E+01

-4.7012E+01

7.8522E+01

-8.7898E+01

S9

3.1313E+00

-9.9841E+00

2.0065E+01

-2.9975E+01

3.5226E+01

-3.2310E+01

2.2581E+01

S10

2.0267E-01

-7.3909E-01

3.6864E-01

1.3690E+00

-3.4927E+00

4.4876E+00

-3.8123E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

5.3798E+02

-5.5633E+02

4.0857E+02

-2.0807E+02

7.0091E+01

-1.4152E+01

1.3130E+00

S2

-1.0625E+04

1.6281E+04

-1.7972E+04

1.3958E+04

-7.2399E+03

2.2500E+03

-3.1655E+02

S3

-3.7549E+05

7.7765E+05

-1.1429E+06

1.1630E+06

-7.7862E+05

3.0830E+05

-5.4676E+04

S4

-2.3831E+06

6.2180E+06

-1.1566E+07

1.4946E+07

-1.2738E+07

6.4310E+06

-1.4556E+06

S5

1.8017E+06

-4.8092E+06

9.1507E+06

-1.2106E+07

1.0578E+07

-5.4874E+06

1.2794E+06

S6

-8.3108E+04

2.0572E+05

-3.5909E+05

4.3122E+05

-3.3863E+05

1.5641E+05

-3.2197E+04

S7

9.0928E+01

-5.8234E+01

2.7175E+01

-9.0151E+00

2.0180E+00

-2.7340E-01

1.6918E-02

S8

7.0047E+01

-4.0420E+01

1.6803E+01

-4.9076E+00

9.5496E-01

-1.1101E-01

5.8218E-03

S9

-1.1793E+01

4.5301E+00

-1.2564E+00

2.4410E-01

-3.1473E-02

2.4168E-03

-8.3597E-05

S10

2.2785E+00

-9.7236E-01

2.9443E-01

-6.1708E-02

8.5001E-03

-6.9140E-04

2.5137E-05

Watch 15

Fig. 10a shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 5, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10b shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10c shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10a to 10c, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, improvement, equivalent replacement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:

a first lens;

a second lens;

a third lens having a negative bending force;

a fifth lens having a negative refractive power, an object side surface of which has a concave shape;

the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length f of the optical imaging system meet the condition that TTL/f is smaller than or equal to 1.0.

2. The optical imaging lens of claim 1, wherein an air interval T23 of the second lens and the third lens on an optical axis, an air interval T12 of the first lens and the second lens on an optical axis, and a center thickness CT2 of the second lens on an optical axis satisfy: 0.5 ≦ T23/(T12+ CT2) ≦ 2.0.

3. The optical imaging lens of claim 1, wherein the air space T34 on the optical axis of the third lens and the fourth lens, the central thickness CT2 on the optical axis of the second lens, and the central thickness CT3 on the optical axis of the third lens satisfy: 1.5 ≦ T34/(CT2+ CT3) ≦ 2.5.

4. The optical imaging lens of claim 1, wherein the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R9 of the object-side surface of the fifth lens satisfy: 3.0 ≦ f4/R8| + | f5/R9| ≦ 4.5.

5. The optical imaging lens of claim 1, wherein the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1.5 ≦ (R7+ R8)/(R7-R8) ≦ 2.3.

6. The optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: 3.0 ≦ f/f4 ≦ 3.6.

7. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens satisfy: 0.5 ≦ f1/R1 ≦ 1.0.

8. The optical imaging lens of claim 1, wherein a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfy: 0.5 ≦ f345/f123| ≦ 6.0.

9. The optical imaging lens according to claim 1, wherein a combined focal length f12 of the first lens and the second lens and a combined focal length f234 of the second lens, the third lens and the fourth lens satisfy: 2.0 ≦ f12/f234| ≦ 3.0.

10. The optical imaging lens of claim 1, wherein an on-axis distance SAG41 from the intersection of the fourth lens object-side surface and the optical axis to the effective radius vertex of the fourth lens object-side surface and an on-axis distance SAG42 from the intersection of the fourth lens image-side surface and the optical axis to the effective radius vertex of the fourth lens image-side surface satisfy: 2.0 ≦ (SAG42+ SAG41)/(SAG42-SAG41) ≦ 3.5.

11. The optical imaging lens of claim 1, wherein the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the last lens and the distance SD from the stop to the image-side surface of the last lens satisfy: 1.0. ltoreq. TD/SD. ltoreq.1.5.

12. An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:

a first lens;

a second lens;

a third lens having a negative bending force;

13. The optical imaging lens of claim 12, wherein an air interval T23 of the second lens and the third lens on an optical axis, an air interval T12 of the first lens and the second lens on an optical axis, and a center thickness CT2 of the second lens on an optical axis satisfy: 0.5 ≦ T23/(T12+ CT2) ≦ 2.0.

14. The optical imaging lens of claim 12, wherein the air space T34 on the optical axis of the third lens and the fourth lens, the central thickness CT2 on the optical axis of the second lens, and the central thickness CT3 on the optical axis of the third lens satisfy: 1.5 ≦ T34/(CT2+ CT3) ≦ 2.5.

15. The optical imaging lens of claim 12, wherein the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R9 of the object-side surface of the fifth lens satisfy: 3.0 ≦ f4/R8| + | f5/R9| ≦ 4.5.

16. The optical imaging lens of claim 12, wherein the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1.5 ≦ (R7+ R8)/(R7-R8) ≦ 2.3.

17. The optical imaging lens of claim 12, wherein the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: 3.0 ≦ f/f4 ≦ 3.6.

18. The optical imaging lens of claim 12, wherein the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens satisfy: 0.5 ≦ f1/R1 ≦ 1.0.

19. The optical imaging lens of claim 12, wherein a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfy: 0.5 ≦ f345/f123| ≦ 6.0.

20. The optical imaging lens of claim 12, wherein a combined focal length f12 of the first lens and the second lens and a combined focal length f234 of the second lens, the third lens and the fourth lens satisfy: 2.0 ≦ f12/f234| ≦ 3.0.

21. The optical imaging lens of claim 12, wherein an on-axis distance SAG41 from the intersection of the fourth lens object-side surface and the optical axis to the effective radius vertex of the fourth lens object-side surface and an on-axis distance SAG42 from the intersection of the fourth lens image-side surface and the optical axis to the effective radius vertex of the fourth lens image-side surface satisfy: 2.0 ≦ (SAG42+ SAG41)/(SAG42-SAG41) ≦ 3.5.

22. The optical imaging lens of claim 12, wherein the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the last lens and the distance SD from the stop to the image-side surface of the last lens satisfy: 1.0. ltoreq. TD/SD. ltoreq.1.5.