CN216792553U

CN216792553U - Optical imaging lens

Info

Publication number: CN216792553U
Application number: CN202220060391.6U
Authority: CN
Inventors: 孙叶萍; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-06-21
Anticipated expiration: 2032-01-11

Abstract

The utility model provides an optical imaging lens. The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: the refractive power of the first lens is positive, the surface of the first lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the refractive power of the second lens is negative, and the surface of the second lens facing the image side is a concave surface; the refractive power of the third lens is negative, and the surface of the third lens facing the object side is a concave surface; the refractive power of the fourth lens is positive, the surface of the fourth lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the refractive power of the fifth lens is negative, the surface of the fifth lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; the on-axis distance TTL from the surface of the first lens piece facing the object side to the imaging surface and the edge thickness ET1 of the first lens piece satisfy the following condition: 4.0< TTL/ET1< 5.0. The utility model solves the problem that the optical imaging lens in the prior art has small head and high imaging quality which are difficult to be considered simultaneously.

Description

Optical imaging lens

Technical Field

The utility model relates to the technical field of optical imaging equipment, in particular to an optical imaging lens.

Background

At present, the rapid development of science and technology makes portable electronic products not only need to satisfy the demand of miniaturization and need to have multiple functions simultaneously, and the function that portable electronic products can realize is various to take the function as an example. In general, an optical imaging lens is mounted on a portable electronic product to realize a photographing function. Nowadays, people have higher and higher requirements on the imaging quality of optical imaging lenses on portable electronic products. However, due to the trend of miniaturization of portable electronic products, the requirements for the total length and the size of the head of the optical imaging lens are becoming more and more strict in order to adapt to the light and thin portable electronic products, and the optical imaging lens is gradually promoted to be miniaturized and lightened. Thus, the design freedom is reduced, and the design difficulty is greatly increased. And with the improvement of the performance and the reduction of the size of the CCD and COMS image sensors, higher requirements are correspondingly put forward on the optical imaging lens.

That is, the optical imaging lens in the related art has a problem that a small head and high imaging quality are difficult to be simultaneously compatible.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an optical imaging lens, which solves the problem that the optical imaging lens in the prior art has small head and high imaging quality and is difficult to simultaneously consider.

In order to achieve the above object, according to an aspect of the present invention, there is provided an optical imaging lens comprising, in order from an object side to an image side along an optical axis: the refractive power of the first lens is positive, the surface of the first lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the refractive power of the second lens is negative, and the surface of the second lens facing the image side is a concave surface; the refractive power of the third lens is negative, and the surface of the third lens facing the object side is a concave surface; the refractive power of the fourth lens is positive, the surface of the fourth lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the refractive power of the fifth lens is negative, the surface of the fifth lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; the on-axis distance TTL from the surface of the first lens piece facing the object side to the imaging surface and the edge thickness ET1 of the first lens piece satisfy the following condition: 4.0< TTL/ET1< 5.0.

Further, the central thickness CT1 of the first lens on the optical axis, the effective half aperture DT11 of the surface of the first lens facing the object side, and the effective half aperture DT12 of the surface of the first lens facing the image side satisfy: 0.5< CT1/(DT11+ DT12) <2.

Further, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy the following conditions: 1.0< f2/(f3+ f5) < 2.0.

Further, the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy the following condition: 1.7< f1/f4< 2.3.

Further, a curvature radius R1 of a surface of the first lens facing the object side and a curvature radius R2 of a surface of the first lens facing the image side satisfy: 1.5< (R2-R1)/(R2+ R1) < 2.3.

Further, a curvature radius R7 of a surface of the fourth lens facing the object side and a curvature radius R8 of a surface of the fourth lens facing the image side satisfy: 3.8< (R7-R8)/(R7+ R8) < 9.5.

Further, a curvature radius R9 of a surface of the fifth lens facing the object side and a curvature radius R10 of a surface of the fifth lens facing the image side satisfy: 1.6< R9/R10< 2.3.

Further, the half ImgH of the diagonal length of the effective pixel area on the imaging surface and the effective focal length f of the optical imaging lens satisfy: 0.6< ImgH/f < 1.2.

Further, the combined focal length f45 of the fourth lens and the fifth lens and the combined focal length f12 of the first lens and the second lens satisfy the following condition: 1.4< f12/f45< 2.2.

Further, the combined focal length f345 of the third lens, the fourth lens and the fifth lens and the effective focal length f of the optical imaging lens satisfy: 2.5< f345/f < 4.0.

Further, the sum Σ CT of the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens and the sum Σ AT of the air spaces between adjacent ones of the first lens to the fifth lens satisfy: 4.2< ∑ CT/Σ AT < 5.0.

Further, an on-axis distance SAG32 between an intersection point of the surface of the third lens facing the image side and the optical axis to an effective radius vertex of the surface of the third lens facing the image side and an on-axis distance SAG31 between an intersection point of the surface of the third lens facing the object side and the optical axis to an effective radius vertex of the surface of the third lens facing the object side satisfy: 1.2< SAG32/SAG31< 2.0.

Further, the air space T23 between the second lens and the third lens on the optical axis, the central thickness CT3 between the third lens and the fourth lens on the optical axis, the air space T34 between the third lens and the fourth lens on the optical axis, and the central thickness CT4 between the fourth lens on the optical axis satisfy: 0.8< (T23+ CT3)/(T34+ CT4) < 1.4.

Further, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 0.6< (ET2+ ET3)/(ET4+ ET5) < 1.3.

According to another aspect of the present invention, there is provided an optical imaging lens, comprising, in order from an object side to an image side along an optical axis: the refractive power of the first lens is positive, the surface of the first lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the refractive power of the second lens is negative, and the surface of the second lens facing the image side is a concave surface; the refractive power of the third lens is negative, and the surface of the third lens facing the object side is a concave surface; the refractive power of the fourth lens is positive, the surface of the fourth lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the refractive power of the fifth lens is negative, the surface of the fifth lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; wherein the sum sigma CT of the central thicknesses of the first, second, third, fourth and fifth lenses and the sum sigma AT of the air spaces between adjacent lenses in the first to fifth lenses satisfy: 4.2< ∑ CT/Σ AT < 5.0.

Further, an on-axis distance TTL from the object-facing surface to the imaging surface of the first lens element to the edge thickness ET1 of the first lens element satisfies: 4.0< TTL/ET1< 5.0; the central thickness CT1 of the first lens on the optical axis, the effective half aperture DT11 of the surface of the first lens facing to the object side and the effective half aperture DT12 of the surface of the first lens facing to the image side satisfy the following conditions: 0.5< CT1/(DT11+ DT12) <2.

Further, the half ImgH of the diagonal length of the effective pixel area on the imaging surface and the effective focal length f of the optical imaging lens satisfy: 0.6< ImgH/f < 1.2; the combined focal length f45 of the fourth lens and the fifth lens and the combined focal length f12 of the first lens and the second lens satisfy the following conditions: 1.4< f12/f45< 2.2.

By applying the technical scheme of the utility model, the optical imaging lens sequentially comprises a positive refractive power of the first lens, a negative refractive power of the second lens, a negative refractive power of the third lens, a positive refractive power of the fourth lens and a negative refractive power of the fifth lens from the object side to the image side along the optical axis, wherein the surface of the first lens facing to the object side is a convex surface, and the surface facing to the image side is a convex surface; the surface of the second lens facing the image side is a concave surface; the surface of the third lens facing the object side is a concave surface; the surface of the fourth lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the surface of the fifth lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; the on-axis distance TTL from the surface of the first lens piece facing the object side to the imaging surface and the edge thickness ET1 of the first lens piece satisfy the following condition: 4.0< TTL/ET1< 5.0.

By reasonably controlling the positive and negative distribution of the surface type and the refractive power of each lens in the optical imaging lens, the low-order aberration of a control system can be effectively balanced, the sensitivity of tolerance is reduced, and the imaging quality of the optical imaging lens is favorably improved. The ratio of the axial distance TTL from the surface of the first lens facing the object side to the imaging surface to the edge thickness ET1 of the first lens is controlled within a reasonable range, so that the size of the first lens and the total size of the optical imaging lens can be effectively controlled, the characteristic of a small head of the optical imaging lens is realized, and the optical imaging lens can be better suitable for more and more ultrathin electronic products in the market.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural view showing an optical imaging lens according to a first example of the present invention;

fig. 2 to 5 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 1;

fig. 6 is a schematic view showing a configuration of an optical imaging lens according to a second example of the present invention;

fig. 7 to 10 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 6;

fig. 11 is a schematic structural view showing an optical imaging lens of example three of the present invention;

fig. 12 to 15 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens in fig. 11;

fig. 16 is a schematic configuration diagram showing an optical imaging lens of example four of the present invention;

fig. 17 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens in fig. 16;

fig. 21 is a schematic view showing a configuration of an optical imaging lens of example five of the present invention;

fig. 22 to 25 show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens in fig. 21;

fig. 26 is a schematic structural view showing an optical imaging lens of example six of the present invention;

fig. 27 to 30 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens in fig. 26.

Wherein the figures include the following reference numerals:

STO, stop; e1, a first lens; s1, the object-side surface of the first lens; s2, the surface of the first lens facing the image side; e2, a second lens; s3, the object-side surface of the second lens; s4, the surface of the second lens facing the image side; e3, third lens; s5, the object-side surface of the third lens; s6, the surface of the third lens facing the image side; e4, fourth lens; s7, the object-side surface of the fourth lens; s8, the surface of the fourth lens facing the image side; e5, fifth lens; s9, the object-side surface of the fifth lens; s10, the surface of the fifth lens facing the image side; e6, optical filters; s11, the surface of the filter facing the object side; s12, the surface of the filter facing the image side; and S13, imaging surface.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is to be noted that, unless otherwise indicated, all 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.

In the present invention, unless stated to the contrary, the use of directional terms such as "upper, lower, top, bottom" or the like, generally refers to the orientation of the components as shown in the drawings, or to the vertical, perpendicular, or gravitational orientation of the components themselves; likewise, for ease of understanding and description, "inner and outer" refer to inner and outer relative to the profile of the components themselves, but the above directional terms are not intended to limit the utility model.

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

In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the 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.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is the surface of the lens facing to the object side, and the surface of each lens close to the image side is called the surface of the lens facing to the image side. The determination of the surface shape in the paraxial region can be made by determining whether or not the surface shape is concave or convex using an R value (R denotes a radius of curvature of the paraxial region, and usually denotes an R value in a lens database (lens data) in optical software) according to a determination method by a person ordinarily skilled in the art. With respect to the surface facing the object side, a convex surface is determined when the R value is positive, and a concave surface is determined when the R value is negative; on the surface facing the image side, the image is determined to be concave when the R value is positive, and convex when the R value is negative.

The utility model provides an optical imaging lens, which aims to solve the problem that the optical imaging lens in the prior art has small head and high imaging quality and is difficult to simultaneously take into account.

Example one

As shown in fig. 1 to 30, the optical imaging lens assembly includes, in order from an object side to an image side along an optical axis, a positive refractive power of the first lens element, a negative refractive power of the second lens element, a negative refractive power of the third lens element, a positive refractive power of the fourth lens element, and a negative refractive power of the fifth lens element, wherein a surface of the first lens element facing the object side is a convex surface, and a surface facing the image side is a convex surface; the surface of the second lens facing the image side is a concave surface; the surface of the third lens facing the object side is a concave surface; the surface of the fourth lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the surface of the fifth lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; the on-axis distance TTL from the surface of the first lens piece facing the object side to the imaging surface and the edge thickness ET1 of the first lens piece satisfy the following condition: 4.0< TTL/ET1< 5.0.

Preferably, 4.1< TTL/ET1< 4.9.

In the present embodiment, the central thickness CT1 of the first lens on the optical axis, the effective half-aperture DT11 of the surface of the first lens facing the object side, and the effective half-aperture DT12 of the surface of the first lens facing the image side satisfy: 0.5< CT1/(DT11+ DT12) <2. The size of the head of the optical imaging lens can be effectively controlled by controlling the relation among the central thickness CT1 of the first lens on the optical axis, the effective half-aperture DT11 of the surface of the first lens facing the object side and the effective half-aperture DT12 of the surface of the first lens facing the image side within a reasonable range, so that the head of the structural part is made small, and the characteristic of small head is realized. Preferably, 0.7< CT1/(DT11+ DT12) < 0.9.

In the embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy the following conditions: 1.0< f2/(f3+ f5) < 2.0. The contribution amount of the second lens, the third lens and the fifth lens to the whole optical imaging lens can be controlled, and the off-axis aberration of the system is balanced, so that the imaging quality of the optical imaging lens is improved. Preferably, 1.2< f2/(f3+ f5) < 1.9.

In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy: 1.7< f1/f4< 2.3. By constraining the ratio between the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens within a reasonable range, the refractive power of the system can be reasonably distributed, so that the positive and negative spherical aberrations of the front group of lenses and the rear group of lenses are mutually offset. Preferably, 2.0< f1/f4< 2.2.

In this embodiment, a radius of curvature R1 of the surface of the first lens facing the object side and a radius of curvature R2 of the surface of the first lens facing the image side satisfy: 1.5< (R2-R1)/(R2+ R1) < 2.3. The contribution amount of the first lens to the astigmatism of the optical imaging lens can be reasonably controlled by meeting the conditional expression. Preferably, 1.7< (R2-R1)/(R2+ R1) < 2.2.

In this embodiment, a radius of curvature R7 of a surface of the fourth lens facing the object side and a radius of curvature R8 of a surface of the fourth lens facing the image side satisfy: 3.8< (R7-R8)/(R7+ R8) < 9.5. The optical imaging lens can effectively control the aberration generated by the fourth lens of the optical imaging lens, and is favorable for ensuring the imaging quality. Preferably, 3.9< (R7-R8)/(R7+ R8) < 9.4.

In this embodiment, a radius of curvature R9 of a surface of the fifth lens facing the object side and a radius of curvature R10 of a surface of the fifth lens facing the image side satisfy: 1.6< R9/R10< 2.3. Satisfying this conditional expression, can making the light angle of marginal visual field in reasonable scope, can effectual reduction optical imaging lens's sensitivity, can making optical imaging lens better match with the chip simultaneously. Preferably, 1.9< R9/R10< 2.1.

In the embodiment, the half ImgH of the diagonal length of the effective pixel area on the imaging plane and the effective focal length f of the optical imaging lens satisfy: 0.6< ImgH/f < 1.2. By controlling the ratio of half of the diagonal length of the effective pixel area on the imaging surface ImgH to the effective focal length f of the optical imaging lens within a reasonable range, the size of the visual field of the optical imaging lens can be effectively controlled to meet the requirements of users. Preferably, 0.8< ImgH/f < 1.0.

In the embodiment, the combined focal length f45 of the fourth lens and the fifth lens and the combined focal length f12 of the first lens and the second lens satisfy the following conditions: 1.4< f12/f45< 2.2. The field curvature of the system can be reasonably controlled within a certain range by meeting the conditional expression. Preferably, 1.6< f12/f45< 2.0.

In the embodiment, the combined focal length f345 of the third lens, the fourth lens and the fifth lens and the effective focal length f of the optical imaging lens satisfy: 2.5< f345/f < 4.0. The optical imaging lens meets the conditional expression, the contribution amount of the third lens, the fourth lens and the fifth lens to the aberration of the whole optical imaging lens can be effectively controlled, the off-axis aberration of the optical imaging lens is balanced, and therefore the imaging quality of the optical imaging lens is improved. Preferably, 2.8< f345/f < 3.9.

In the present embodiment, the sum Σ CT of the center thicknesses of the first, second, third, fourth, and fifth lenses and the sum Σ AT of the air spaces between adjacent ones of the first to fifth lenses satisfy: 4.2< ∑ CT/Σ AT < 5.0. The ratio of the sum sigma CT of the central thicknesses of the first lens, the second lens, the third lens, the fourth lens and the fifth lens to the sum sigma AT of the air intervals between the adjacent lenses in the first lens to the fifth lens is controlled within a reasonable range, so that the central thicknesses of the lenses and the air intervals between the adjacent lenses are reasonably distributed, and the processing and assembling characteristics of the optical imaging lens can be ensured; meanwhile, the field curvature contribution of each field of the system can be controlled within a reasonable range, the resolving power of the optical imaging lens is effectively improved, and the imaging quality is improved. Preferably, 4.4< ∑ CT/Σ AT < 4.9.

In this embodiment, an on-axis distance SAG32 between an intersection point of an image-side-facing surface of the third lens and the optical axis and an effective radius vertex of the image-side-facing surface of the third lens and an on-axis distance SAG31 between an intersection point of an object-side-facing surface of the third lens and the optical axis and an effective radius vertex of the object-side-facing surface of the third lens satisfy: 1.2< SAG32/SAG31< 2.0. The processing opening angle of the third lens can be effectively controlled, the ghost image risk of the third lens is reduced, and meanwhile, the difficulty brought to subsequent links such as process processing, forming and film coating is avoided. Preferably, 1.4< SAG32/SAG31< 1.9.

In the embodiment, the air space T23 between the second lens and the third lens on the optical axis, the central thickness CT3 between the third lens and the fourth lens on the optical axis, the air space T34 between the third lens and the fourth lens on the optical axis, and the central thickness CT4 between the fourth lens on the optical axis satisfy: 0.8< (T23+ CT3)/(T34+ CT4) < 1.4. When the conditional expression is satisfied, the field curvature contribution of each field of view can be controlled within a reasonable range. Preferably, 1.0< (T23+ CT3)/(T34+ CT4) < 1.3.

In the present embodiment, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 0.6< (ET2+ ET3)/(ET4+ ET5) < 1.3. The thickness of the second lens, the third lens, the fourth lens and the fifth lens can be reasonably configured when the conditional expression is met, and the processing characteristics of the lenses are guaranteed. Preferably, 0.7< (ET2+ ET3)/(ET4+ ET5) < 1.1.

Example two

As shown in fig. 1 to 30, the optical imaging lens assembly includes, in order from an object side to an image side along an optical axis, a positive refractive power of the first lens element, a negative refractive power of the second lens element, a negative refractive power of the third lens element, a positive refractive power of the fourth lens element, and a negative refractive power of the fifth lens element, wherein a surface of the first lens element facing the object side is a convex surface, and a surface facing the image side is a convex surface; the surface of the second lens facing the image side is a concave surface; the surface of the third lens facing the object side is a concave surface; the surface of the fourth lens facing the object side is a convex surface, and the surface facing the image side is a convex surface; the surface of the fifth lens facing the object side is a convex surface, and the surface facing the image side is a concave surface; wherein the sum sigma CT of the central thicknesses of the first, second, third, fourth and fifth lenses and the sum sigma AT of the air spaces between adjacent lenses in the first to fifth lenses satisfy: 4.2< ∑ CT/Σ AT < 5.0.

Preferably, 4.4< ∑ CT/Σ AT < 4.9.

By reasonably controlling the surface type and the positive and negative distribution of the refractive power of each lens in the optical imaging lens, the low-order aberration of a control system can be effectively balanced, the sensitivity of tolerance is reduced, and the imaging quality of the optical imaging lens is favorably improved. The ratio of the sum sigma CT of the central thicknesses of the first lens, the second lens, the third lens, the fourth lens and the fifth lens to the sum sigma AT of the air intervals between the adjacent lenses in the first lens to the fifth lens is controlled within a reasonable range, so that the central thicknesses of the lenses and the air intervals between the adjacent lenses are reasonably distributed, and the processing and assembling characteristics of the optical imaging lens can be ensured; meanwhile, the field curvature contribution of each field of the system can be controlled within a reasonable range, the resolving power of the optical imaging lens is effectively improved, and the imaging quality is improved.

In this embodiment, an on-axis distance TTL from an object-facing surface to an imaging surface of the first lens element to the edge thickness ET1 of the first lens element satisfies: 4.0< TTL/ET1< 5.0. The ratio of the axial distance TTL from the surface of the first lens facing the object side to the imaging surface to the edge thickness ET1 of the first lens is controlled within a reasonable range, so that the size of the first lens and the total size of the optical imaging lens can be effectively controlled, the characteristic of a small head of the optical imaging lens is realized, and the optical imaging lens can be better suitable for more and more ultrathin electronic products in the market. Preferably, 4.1< TTL/ET1< 4.9.

In the embodiment, the air space T23 between the second lens and the third lens on the optical axis, the central thickness CT3 between the third lens and the fourth lens on the optical axis, the air space T34 between the third lens and the fourth lens on the optical axis, and the central thickness CT4 between the fourth lens on the optical axis satisfy: 0.8< (T23+ CT3)/(T34+ CT4) < 1.4. Satisfying the conditional expression, the field curvature contribution of each field of view can be controlled in a reasonable range. Preferably, 1.0< (T23+ CT3)/(T34+ CT4) < 1.3.

The above-described optical imaging lens may further optionally include a filter for correcting color deviation or a protective glass for protecting a photosensitive element located on the imaging surface.

The optical imaging lens in the present application may employ a plurality of lenses, for example, the above-mentioned five lenses. By reasonably distributing the refractive power, the surface shape, the center thickness of each lens, the on-axis distance between each lens and the like, the sensitivity of the lens can be effectively reduced, the machinability of the lens can be improved, and the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The left side is the object side and the right side is the image side.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens has the characteristics that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the lens center to the lens periphery, an aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

However, it will be understood by those skilled in the art that the number of lenses constituting the optical imaging lens may be varied to obtain the respective results and advantages described in the present specification without departing from the technical solutions claimed in the present application. For example, although five lenses are exemplified in the embodiments, the optical imaging lens is not limited to include five lenses. The optical imaging lens may also include other numbers of lenses, as desired.

Examples of specific surface types and parameters applicable to the optical imaging lens of the above-described embodiment are further described below with reference to the drawings.

It should be noted that any one of the following examples one to six is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 5, an optical imaging lens of the first example of the present application is described. Fig. 1 shows a schematic diagram of an optical imaging lens structure of example one.

As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a filter E6, and an image plane S13.

The first lens element E1 with positive refractive power has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 with negative refractive power has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 with negative refractive power has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 with positive refractive power has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 with negative refractive power has a convex object-side surface S9 and a concave image-side surface S10. The filter E6 has a surface S11 facing the object side of the filter and a surface S12 facing the image side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In this example, the total effective focal length f of the optical imaging lens is 2.75mm, the total system length TTL of the optical imaging lens is 3.90mm, and the image height ImgH is 2.30 mm.

Table 1 shows a basic structural parameter table of the optical imaging lens of example one, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 1

In an example one, a surface facing the object side and a surface facing the image side of any one of the first lens E1 through the fifth lens E5 are aspheric, and the surface type of each aspheric lens can be defined by, but is 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 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each of the aspherical mirrors S1-S10 in example one.

TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of example one, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 3 shows astigmatism curves of the optical imaging lens of example one, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the optical imaging lens of example one, which indicate distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the optical imaging lens of example one, which represents a deviation of different image heights on a surface facing an image side of light rays passing through the optical imaging lens.

As can be seen from fig. 2 to 5, the optical imaging lens of the first example can achieve good imaging quality.

Example two

As shown in fig. 6 to 10, an optical imaging lens of example two of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 6 shows a schematic diagram of the optical imaging lens structure of example two.

As shown in fig. 6, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a filter E6, and an image plane S13.

The first lens element E1 with positive refractive power has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 with negative refractive power has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 with negative refractive power has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 with positive refractive power has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 with negative refractive power has a convex object-side surface S9 and a concave image-side surface S10. The filter E6 has a surface S11 facing the object side of the filter and a surface S12 facing the image side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In this example, the total effective focal length f of the optical imaging lens is 2.70mm, the total system length TTL of the optical imaging lens is 3.90mm, and the image height ImgH is 2.42 mm.

Table 3 shows a basic structural parameter table of the optical imaging lens of example two, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 3

Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in example two, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-7.5871E-02

2.1522E+00

-4.8823E+01

8.0386E+02

-9.8947E+03

9.0259E+04

-6.0501E+05

S2

-6.7211E-02

-7.6420E+00

1.7451E+02

-2.6303E+03

2.7361E+04

-2.0187E+05

1.0757E+06

S3

-2.2486E-01

-3.2700E+00

2.7675E+01

-2.0110E+02

1.4043E+03

-8.3889E+03

3.7851E+04

S4

2.8766E-01

-3.5331E+00

3.1528E+01

-2.8716E+02

2.1304E+03

-1.1496E+04

4.4449E+04

S5

2.8047E-01

2.1720E+00

-4.3534E+01

4.4508E+02

-3.2536E+03

1.7491E+04

-6.8850E+04

S6

-1.9900E+00

2.0083E+01

-1.3394E+02

5.8196E+02

-1.8521E+03

4.7064E+03

-1.0016E+04

S7

-1.7934E+00

2.0718E+01

-1.2394E+02

4.8501E+02

-1.3486E+03

2.7424E+03

-4.1272E+03

S8

6.1654E-01

-3.3364E-01

9.5027E+00

-5.5370E+01

1.4965E+02

-2.4745E+02

2.7677E+02

S9

-7.8940E-01

1.8531E+00

-8.6049E+00

2.8846E+01

-6.4019E+01

9.4948E+01

-9.6207E+01

S10

-3.7153E-01

1.7564E-01

2.6860E-01

-6.3235E-01

1.2807E-01

1.1044E+00

-1.8970E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

2.9638E+06

-1.0537E+07

2.6807E+07

-4.7465E+07

5.5480E+07

-3.8442E+07

1.1948E+07

S2

-4.1745E+06

1.1785E+07

-2.3903E+07

3.3884E+07

-3.1821E+07

1.7765E+07

-4.4578E+06

S3

-1.1881E+05

2.4214E+05

-2.7844E+05

7.5954E+04

2.2955E+05

-2.9059E+05

1.1118E+05

S4

-1.2378E+05

2.4870E+05

-3.5737E+05

3.5830E+05

-2.3815E+05

9.4329E+04

-1.6860E+04

S5

1.9752E+05

-4.1053E+05

6.0995E+05

-6.3038E+05

4.2984E+05

-1.7361E+05

3.1420E+04

S6

1.7820E+04

-2.5459E+04

2.7661E+04

-2.1569E+04

1.1241E+04

-3.4795E+03

4.8117E+02

S7

4.6111E+03

-3.8052E+03

2.2843E+03

-9.6807E+02

2.7401E+02

-4.6413E+01

3.5528E+00

S8

-2.1849E+02

1.2353E+02

-4.9801E+01

1.3981E+01

-2.5965E+00

2.8664E-01

-1.4234E-02

S9

6.7983E+01

-3.3866E+01

1.1860E+01

-2.8610E+00

4.5298E-01

-4.2404E-02

1.7797E-03

S10

1.6582E+00

-9.1466E-01

3.3584E-01

-8.2197E-02

1.2911E-02

-1.1790E-03

4.7623E-05

TABLE 4

Fig. 7 shows an on-axis chromatic aberration curve of the optical imaging lens of example two, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 8 shows astigmatism curves of the optical imaging lens of example two, which represent meridional field curvature and sagittal field curvature. Fig. 9 shows distortion curves of the optical imaging lens of example two, which represent distortion magnitude values corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the optical imaging lens of example two, which represents the deviation of different image heights on the surface facing the image side of the light ray passing through the optical imaging lens.

As can be seen from fig. 7 to 10, the optical imaging lens according to the second example can achieve good imaging quality.

Example III

As shown in fig. 11 to 15, an optical imaging lens of example three of the present application is described. Fig. 11 shows a schematic diagram of an optical imaging lens structure of example three.

As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a filter E6, and an image plane S13.

The first lens element E1 with positive refractive power has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 with negative refractive power has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 with negative refractive power has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 with positive refractive power has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 with negative refractive power has a convex object-side surface S9 and a concave image-side surface S10. The filter E6 has a surface S11 facing the object side of the filter and a surface S12 facing the image side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In this example, the total effective focal length f of the optical imaging lens is 2.73mm, the total system length TTL of the optical imaging lens is 3.90mm, and the image height ImgH is 2.60 mm.

Table 5 shows a basic structural parameter table of the optical imaging lens of example three, in which the units of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 5

Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-9.2374E-02

3.3986E+00

-9.0041E+01

1.5953E+03

-1.9497E+04

1.6780E+05

-1.0343E+06

S2

-1.6128E-01

-6.1074E+00

1.4698E+02

-2.2601E+03

2.3578E+04

-1.7277E+05

9.0914E+05

S3

-4.3074E-01

1.9250E+00

-6.4019E+01

9.7117E+02

-9.2065E+03

5.9741E+04

-2.7610E+05

S4

1.0811E-01

-9.0007E-01

7.3057E+00

-1.2109E+02

1.3325E+03

-9.1121E+03

4.1561E+04

S5

2.2528E-01

2.6955E+00

-5.3738E+01

6.0783E+02

-4.7399E+03

2.6158E+04

-1.0339E+05

S6

-2.1153E+00

2.1412E+01

-1.3117E+02

4.6821E+02

-9.1056E+02

2.1111E+02

4.2729E+03

S7

-2.1030E+00

2.5156E+01

-1.5286E+02

6.0642E+02

-1.6992E+03

3.4590E+03

-5.1820E+03

S8

6.2453E-01

-2.6774E-01

9.6355E+00

-5.6060E+01

1.4997E+02

-2.4480E+02

2.6958E+02

S9

-6.7708E-01

1.0899E+00

-4.5561E+00

1.4842E+01

-3.2029E+01

4.5711E+01

-4.4080E+01

S10

-4.0408E-01

4.9316E-01

-7.6154E-01

1.1970E+00

-1.7125E+00

1.9319E+00

-1.5886E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

4.6114E+06

-1.4888E+07

3.4454E+07

-5.5694E+07

5.9695E+07

-3.8107E+07

1.0963E+07

S2

-3.4732E+06

9.6364E+06

-1.9199E+07

2.6737E+07

-2.4682E+07

1.3556E+07

-3.3502E+06

S3

9.2768E+05

-2.2809E+06

4.0745E+06

-5.1601E+06

4.3995E+06

-2.2669E+06

5.3341E+05

S4

-1.3186E+05

2.9625E+05

-4.7088E+05

5.1880E+05

-3.7739E+05

1.6319E+05

-3.1790E+04

S5

2.9479E+05

-6.0615E+05

8.8928E+05

-9.0664E+05

6.0942E+05

-2.4241E+05

4.3141E+04

S6

-1.3919E+04

2.4617E+04

-2.8274E+04

2.1682E+04

-1.0775E+04

3.1538E+03

-4.1448E+02

S7

5.7364E+03

-4.6729E+03

2.7611E+03

-1.1494E+03

3.1919E+02

-5.3019E+01

3.9803E+00

S8

-2.0899E+02

1.1579E+02

-4.5683E+01

1.2543E+01

-2.2787E+00

2.4625E-01

-1.1985E-02

S9

2.9389E+01

-1.3729E+01

4.4892E+00

-1.0080E+00

1.4823E-01

-1.2868E-02

5.0021E-04

S10

9.3415E-01

-3.9151E-01

1.1598E-01

-2.3726E-02

3.1889E-03

-2.5337E-04

9.0165E-06

TABLE 6

Fig. 12 shows an on-axis chromatic aberration curve of the optical imaging lens of example three, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 13 shows astigmatism curves of the optical imaging lens of example three, which represent meridional field curvature and sagittal field curvature. Fig. 14 shows distortion curves of the optical imaging lens of example three, which represent distortion magnitude values corresponding to different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the optical imaging lens of example three, which represents the deviation of different image heights on the surface facing the image side of light rays after passing through the optical imaging lens.

As can be seen from fig. 12 to 15, the optical imaging lens according to the third example can achieve good imaging quality.

Example four

As shown in fig. 16 to 20, an optical imaging lens of example four of the present application is described. Fig. 16 shows a schematic diagram of an optical imaging lens structure of example four.

As shown in fig. 16, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a filter E6, and an image plane S13.

In this example, the total effective focal length f of the optical imaging lens is 2.67mm, the total system length TTL of the optical imaging lens is 3.86mm, and the image height ImgH is 2.42 mm.

Table 7 shows a basic structural parameter table of the optical imaging lens of example four, in which the units of the radius of curvature and the thickness/distance are millimeters (mm).

TABLE 7

Table 8 shows the high-order term coefficients that can be used for each aspherical mirror surface in example four, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

TABLE 8

Fig. 17 shows an on-axis chromatic aberration curve of the optical imaging lens of example four, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 18 shows astigmatism curves of the optical imaging lens of example four, which represent meridional field curvature and sagittal field curvature. Fig. 19 shows distortion curves of the optical imaging lens of example four, which represent distortion magnitude values corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the optical imaging lens of example four, which represents a deviation of different image heights on a plane toward the image side of light rays after passing through the optical imaging lens.

As can be seen from fig. 17 to 20, the optical imaging lens according to example four can achieve good imaging quality.

Example five

As shown in fig. 21 to 25, an optical imaging lens of example five of the present application is described. Fig. 21 shows a schematic diagram of an optical imaging lens structure of example five.

As shown in fig. 21, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a filter E6, and an image plane S13.

The first lens element E1 with positive refractive power has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 with negative refractive power has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative refractive power, and the object-side surface S5 of the third lens element is concave, and the image-side surface S6 of the third lens element is concave. The fourth lens element E4 with positive refractive power has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 with negative refractive power has a convex object-side surface S9 and a concave image-side surface S10. The filter E6 has a surface S11 facing the object side of the filter and a surface S12 facing the image side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In this example, the total effective focal length f of the optical imaging lens is 2.67mm, the total system length TTL of the optical imaging lens is 3.90mm, and the image height ImgH is 2.42 mm.

Table 9 shows a basic structural parameter table of the optical imaging lens of example five, in which the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 9

Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in example five, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-9.7797E-02

3.6725E+00

-9.7304E+01

1.7110E+03

-2.1142E+04

1.8902E+05

-1.2414E+06

S2

-3.9140E-02

-1.3238E+01

3.5340E+02

-6.2328E+03

7.5335E+04

-6.4098E+05

3.9146E+06

S3

-2.2906E-01

-4.0796E+00

3.5449E+01

-2.3086E+02

8.7372E+02

1.2045E+03

-3.8428E+04

S4

2.9288E-01

-2.0836E+00

-2.1836E-01

8.9987E+01

-8.4421E+02

4.9683E+03

-2.1048E+04

S5

2.2651E-01

4.8447E+00

-9.3897E+01

1.0064E+03

-7.3819E+03

3.8697E+04

-1.4716E+05

S6

-2.1113E+00

2.1861E+01

-1.5273E+02

7.0449E+02

-2.3775E+03

6.2332E+03

-1.3006E+04

S7

-1.9558E+00

2.2311E+01

-1.3286E+02

5.2165E+02

-1.4618E+03

3.0031E+03

-4.5743E+03

S8

5.5497E-01

-2.2563E-02

1.0543E+01

-6.5271E+01

1.8151E+02

-3.0882E+02

3.5718E+02

S9

-7.3436E-01

1.4639E+00

-7.6568E+00

2.7049E+01

-6.0972E+01

9.0899E+01

-9.2400E+01

S10

-3.1779E-01

-2.6665E-01

1.7327E+00

-3.7648E+00

4.8406E+00

-3.9451E+00

1.9749E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

6.0174E+06

-2.1444E+07

5.5379E+07

-1.0067E+08

1.2197E+08

-8.8319E+07

2.8877E+07

S2

-1.7333E+07

5.5647E+07

-1.2809E+08

2.0581E+08

-2.1895E+08

1.3848E+08

-3.9389E+07

S3

2.5356E+05

-9.7222E+05

2.4332E+06

-4.0370E+06

4.2937E+06

-2.6555E+06

7.2690E+05

S4

6.5505E+04

-1.4890E+05

2.4300E+05

-2.7622E+05

2.0709E+05

-9.1877E+04

1.8245E+04

S5

4.0813E+05

-8.2320E+05

1.1922E+06

-1.2058E+06

8.0746E+05

-3.2121E+05

5.7391E+04

S6

2.1533E+04

-2.7679E+04

2.6665E+04

-1.8340E+04

8.3830E+03

-2.2459E+03

2.6129E+02

S7

5.1819E+03

-4.3432E+03

2.6519E+03

-1.1443E+03

3.3001E+02

-5.6968E+01

4.4441E+00

S8

-2.9363E+02

1.7427E+02

-7.4378E+01

2.2291E+01

-4.4551E+00

5.3313E-01

-2.8887E-02

S9

6.5560E+01

-3.2860E+01

1.1610E+01

-2.8339E+00

4.5540E-01

-4.3397E-02

1.8593E-03

S10

-4.7290E-01

-7.4431E-02

1.0116E-01

-3.6967E-02

7.2039E-03

-7.5586E-04

3.3697E-05

TABLE 10

Fig. 22 shows an on-axis chromatic aberration curve of the optical imaging lens of example five, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 23 shows astigmatism curves of the optical imaging lens of example five, which represent meridional field curvature and sagittal field curvature. Fig. 24 shows distortion curves of the optical imaging lens of example five, which represent distortion magnitude values corresponding to different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the optical imaging lens of example five, which represents a deviation of different image heights on a face toward the image side of light rays after passing through the optical imaging lens.

As can be seen from fig. 22 to 25, the optical imaging lens according to example five can achieve good imaging quality.

Example six

As shown in fig. 26 to 30, an optical imaging lens of example six of the present application is described. Fig. 26 shows a schematic diagram of an optical imaging lens structure of example six.

As shown in fig. 26, the optical imaging lens, in order from an object side to an image side, comprises: a stop STO, a first mirror E1, a second mirror E2, a third mirror E3, a fourth mirror E4, a fifth mirror E5, a filter E6, and an image plane S13.

In this example, the total effective focal length f of the optical imaging lens is 2.63mm, the total system length TTL of the optical imaging lens is 3.85mm, and the image height ImgH is 2.42 mm.

Table 11 shows a basic structural parameter table of the optical imaging lens of example six, in which the units of the radius of curvature, thickness/distance are millimeters (mm).

TABLE 11

Table 12 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-4.8572E-02

7.5876E-01

4.3502E+00

-5.8318E+02

1.3780E+04

-1.8120E+05

1.5513E+06

S2

-1.7939E-01

-7.2887E+00

1.9027E+02

-3.3454E+03

4.0709E+04

-3.5041E+05

2.1744E+06

S3

-2.5926E-01

-3.4420E+00

2.4338E+01

-4.4047E+01

-1.5085E+03

2.2235E+04

-1.6763E+05

S4

2.9511E-01

-2.6716E+00

1.1665E+01

-2.6336E+01

-1.3283E+02

1.9419E+03

-1.1552E+04

S5

3.0935E-01

2.3523E+00

-5.6343E+01

6.6184E+02

-5.2096E+03

2.8861E+04

-1.1468E+05

S6

-2.0824E+00

2.1128E+01

-1.4782E+02

6.9875E+02

-2.4726E+03

6.9218E+03

-1.5547E+04

S7

-1.9457E+00

2.2148E+01

-1.3303E+02

5.2879E+02

-1.5008E+03

3.1207E+03

-4.8085E+03

S8

5.3771E-01

7.9093E-02

9.1823E+00

-5.7492E+01

1.5791E+02

-2.6404E+02

2.9982E+02

S9

-7.0551E-01

1.1762E+00

-5.8288E+00

2.0247E+01

-4.5133E+01

6.6509E+01

-6.6633E+01

S10

-2.8896E-01

-3.4598E-01

1.9845E+00

-4.4331E+00

6.1216E+00

-5.6530E+00

3.5813E+00

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

-9.1426E+06

3.7857E+07

-1.1005E+08

2.1997E+08

-2.8786E+08

2.2197E+08

-7.6433E+07

S2

-9.8239E+06

3.2316E+07

-7.6509E+07

1.2686E+08

-1.3966E+08

9.1609E+07

-2.7066E+07

S3

8.1585E+05

-2.7210E+06

6.3009E+06

-9.9834E+06

1.0338E+07

-6.3083E+06

1.7206E+06

S4

4.2816E+04

-1.0721E+05

1.8489E+05

-2.1702E+05

1.6586E+05

-7.4489E+04

1.4919E+04

S5

3.2971E+05

-6.8575E+05

1.0204E+06

-1.0578E+06

7.2463E+05

-2.9449E+05

5.3696E+04

S6

2.7654E+04

-3.7911E+04

3.8673E+04

-2.8069E+04

1.3570E+04

-3.8834E+03

4.9299E+02

S7

5.5068E+03

-4.6631E+03

2.8745E+03

-1.2512E+03

3.6369E+02

-6.3226E+01

4.9635E+00

S8

-2.4208E+02

1.4131E+02

-5.9420E+01

1.7578E+01

-3.4739E+00

4.1170E-01

-2.2119E-02

S9

4.6465E+01

-2.2845E+01

7.9090E+00

-1.8908E+00

2.9763E-01

-2.7794E-02

1.1677E-03

S10

-1.5575E+00

4.5388E-01

-8.2486E-02

7.3245E-03

1.8428E-04

-1.0008E-04

6.3850E-06

TABLE 12

Fig. 27 shows on-axis chromatic aberration curves of the optical imaging lens of example six, which represent the deviation of the convergence focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 28 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example six. Fig. 29 shows distortion curves of the optical imaging lens of example six, which represent distortion magnitude values corresponding to different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the optical imaging lens of example six, which represents a deviation of different image heights on a plane toward the image side of light rays after passing through the optical imaging lens.

As can be seen from fig. 27 to 30, the optical imaging lens according to example six can achieve good imaging quality.

To sum up, examples one to six satisfy the relationships shown in table 13, respectively.

Table 13 table 14 gives effective focal lengths f of the optical imaging lenses of example one to example six, effective focal lengths f1 to f5 of the respective lenses, and the like.

Parameters/examples	1	2	3	4	6	7
							f1(mm)	2.70	2.65	2.70	2.72	2.76	2.69
f2(mm)	-6.27	-6.50	-8.51	-7.83	-8.21	-8.82
							f3(mm)	-2.81	-2.72	-2.72	-2.59	-2.54	-2.44
f4(mm)	1.30	1.32	1.33	1.30	1.30	1.31
							f5(mm)	-2.05	-2.26	-2.16	-2.26	-2.30	-2.30
f(mm)	2.75	2.70	2.73	2.67	2.67	2.63
							TTL(mm)	3.90	3.90	3.90	3.86	3.90	3.85
ImgH(mm)	2.30	2.42	2.60	2.42	2.42	2.42

TABLE 14

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be 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.

It is to be understood that the above-described embodiments are only a few, and not all, embodiments of the present invention. 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 invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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

the refractive power of the first lens is positive, the surface of the first lens facing the object side is a convex surface, and the surface facing the image side is a convex surface;

the refractive power of the second lens is negative, and the surface of the second lens facing the image side is a concave surface;

the refractive power of the third lens is negative, and the surface of the third lens facing the object side is a concave surface;

the refractive power of the fourth lens is positive, the surface of the fourth lens facing the object side is a convex surface, and the surface facing the image side is a convex surface;

the refractive power of the fifth lens is negative, the surface of the fifth lens facing the object side is a convex surface, and the surface facing the image side is a concave surface;

wherein, the on-axis distance TTL from the object-facing surface to the imaging surface of the first lens to the edge thickness ET1 of the first lens satisfies the following condition: 4.0< TTL/ET1< 5.0.

2. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on the optical axis, an effective half aperture DT11 of a surface of the first lens facing the object side, and an effective half aperture DT12 of a surface of the first lens facing the image side satisfy: 0.5< CT1/(DT11+ DT12) <2.

3. The optical imaging lens of claim 1, characterized in that the effective focal length f2 of the second lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: 1.0< f2/(f3+ f5) < 2.0.

4. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy: 1.7< f1/f4< 2.3.

5. The optical imaging lens of claim 1, wherein a radius of curvature R1 of a surface of the first lens facing the object side and a radius of curvature R2 of a surface of the first lens facing the image side satisfy: 1.5< (R2-R1)/(R2+ R1) < 2.3.

6. The optical imaging lens of claim 1, wherein a radius of curvature R7 of a surface of the fourth lens facing the object side and a radius of curvature R8 of a surface of the fourth lens facing the image side satisfy: 3.8< (R7-R8)/(R7+ R8) < 9.5.

7. The optical imaging lens of claim 1, wherein a radius of curvature R9 of a surface of the fifth lens facing the object side and a radius of curvature R10 of a surface of the fifth lens facing the image side satisfy: 1.6< R9/R10< 2.3.

8. The optical imaging lens according to claim 1, wherein the ImgH which is half the diagonal length of the effective pixel area on the imaging plane and the effective focal length f of the optical imaging lens satisfy: 0.6< ImgH/f < 1.2.

9. The optical imaging lens of claim 1, wherein a combined focal length f45 of the fourth and fifth lenses and a combined focal length f12 of the first and second lenses satisfy: 1.4< f12/f45< 2.2.

10. The optical imaging lens of claim 1, wherein a composite focal length f345 of the third, fourth and fifth lenses and an effective focal length f of the optical imaging lens satisfy: 2.5< f345/f < 4.0.

11. The optical imaging lens according to claim 1, characterized in that a sum Σ CT of center thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens and a sum Σ AT of air spaces between adjacent lenses of the first lens to the fifth lens satisfy: 4.2< ∑ CT/Σ AT < 5.0.

12. The optical imaging lens according to claim 1, wherein an on-axis distance SAG32 between an intersection point of the surface of the third lens facing the image side and the optical axis to an effective radius vertex of the surface of the third lens facing the image side and an on-axis distance SAG31 between an intersection point of the surface of the third lens facing the object side and the optical axis to an effective radius vertex of the surface of the third lens facing the object side satisfy: 1.2< SAG32/SAG31< 2.0.

13. The optical imaging lens of claim 1, wherein an air space T23 of the second and third lenses on the optical axis, a center thickness CT3 of the third lens on the optical axis, an air space T34 of the third and fourth lenses on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.8< (T23+ CT3)/(T34+ CT4) < 1.4.

14. The optical imaging lens according to claim 1, characterized in that the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 0.6< (ET2+ ET3)/(ET4+ ET5) < 1.3.

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

the refractive power of the fourth lens is positive, and a surface of the fourth lens facing the object side is a convex surface and a surface facing the image side is a convex surface;

wherein a sum of center thicknesses ∑ CT of the first, second, third, fourth, and fifth lenses and a sum ∑ AT of air spaces between adjacent ones of the first to fifth lenses satisfy: 4.2< ∑ CT/Σ AT < 5.0.

16. The optical imaging lens assembly according to claim 15, wherein an on-axis distance TTL between an object side-facing surface and an imaging surface of the first lens and an edge thickness ET1 of the first lens satisfy: 4.0< TTL/ET1< 5.0; the central thickness CT1 of the first lens on the optical axis, the effective half aperture DT11 of the surface of the first lens facing to the object side and the effective half aperture DT12 of the surface of the first lens facing to the image side satisfy the following conditions: 0.5< CT1/(DT11+ DT12) <2.

17. The optical imaging lens of claim 15, wherein the effective focal length f2 of the second lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: 1.0< f2/(f3+ f5) < 2.0.

18. The optical imaging lens of claim 15, wherein the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy: 1.7< f1/f4< 2.3.

19. The optical imaging lens of claim 15, wherein a radius of curvature R1 of a surface of the first lens facing the object side and a radius of curvature R2 of a surface of the first lens facing the image side satisfy: 1.5< (R2-R1)/(R2+ R1) < 2.3.

20. The optical imaging lens of claim 15, wherein a radius of curvature R7 of a surface of the fourth lens facing the object side and a radius of curvature R8 of a surface of the fourth lens facing the image side satisfy: 3.8< (R7-R8)/(R7+ R8) < 9.5.

21. The optical imaging lens according to claim 15, wherein a radius of curvature R9 of a surface of the fifth lens facing the object side and a radius of curvature R10 of a surface of the fifth lens facing the image side satisfy: 1.6< R9/R10< 2.3.

22. The optical imaging lens of claim 15, wherein the ImgH which is half the diagonal length of the effective pixel area on the imaging plane and the effective focal length f of the optical imaging lens satisfy: 0.6< ImgH/f < 1.2; the combined focal length f45 of the fourth lens and the fifth lens and the combined focal length f12 of the first lens and the second lens satisfy the following condition: 1.4< f12/f45< 2.2.

23. The optical imaging lens of claim 15, wherein a combined focal length f345 of the third, fourth and fifth lenses and an effective focal length f of the optical imaging lens satisfy: 2.5< f345/f < 4.0.

24. The optical imaging lens of claim 15, wherein an on-axis distance SAG32 between an intersection point of the surface of the third lens facing the image side and the optical axis to an effective radius vertex of the surface of the third lens facing the image side and an on-axis distance SAG31 between an intersection point of the surface of the third lens facing the object side and the optical axis to an effective radius vertex of the surface of the third lens facing the object side satisfy: 1.2< SAG32/SAG31< 2.0.

25. The optical imaging lens of claim 15 wherein the air space T23 on the optical axis between the second and third lenses, the central thickness CT3 on the optical axis between the third and fourth lenses, the air space T34 on the optical axis between the third and fourth lenses, and the central thickness CT4 on the optical axis between the fourth lens: 0.8< (T23+ CT3)/(T34+ CT4) < 1.4.

26. The optical imaging lens according to claim 15, characterized in that the edge thickness ET2 of the second lens piece, the edge thickness ET3 of the third lens piece, the edge thickness ET4 of the fourth lens piece and the edge thickness ET5 of the fifth lens piece satisfy: 0.6< (ET2+ ET3)/(ET4+ ET5) < 1.3.