CN113608333B

CN113608333B - Optical imaging lens

Info

Publication number: CN113608333B
Application number: CN202110852028.8A
Authority: CN
Inventors: 侯璟; 张晓彬; 闻人建科; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-10-04
Anticipated expiration: 2041-07-27
Also published as: CN113608333A

Abstract

The invention provides an optical imaging lens. The imaging lens sequentially comprises the following components from the object side to the image side of the imaging lens: a diaphragm; a first lens having a positive refractive power; a second lens having a positive refractive power; a third lens; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; a fifth lens; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy the following condition: 1.2 and then the ttl/ImgH is less than 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 45 ° < Semi-FOV <60 °. The invention solves the problem that the camera lens of the mobile phone in the prior art has smaller self-photographing view.

Description

Optical imaging lens

Technical Field

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

Background

With the iterative update speed of intelligent electronic devices such as mobile phones, computers and tablets becoming faster and faster, the camera shooting function of the products is also becoming more and more required by the market. In addition to the requirement of good imaging quality, the lens is also required to maintain the characteristics of high resolution, large depth of field, large aperture and the like. In the aspect of front lenses, more and more mobile phone terminals begin to use wide-angle lenses, so that the mobile phone terminal can have a wider view field range during self-shooting so as to solve the problem that people have insufficient view field for self-shooting.

That is to say, there is the less problem in the cell-phone camera lens among the prior art autodyne field of vision.

Disclosure of Invention

The invention mainly aims to provide an optical imaging lens to solve the problem that a mobile phone lens in the prior art is small in self-photographing view.

In order to achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens comprising, in order from an object side to an image side of the optical imaging lens: a diaphragm; a first lens having a positive refractive power; a second lens having a positive refractive power; a third lens; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; a fifth lens; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy the following condition: 1.2 and then the ttl/ImgH is less than 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 45 ° < Semi-FOV <60 °.

Further, the effective focal length f of the optical imaging lens, half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens satisfy: 1< -f tan (Semi-FOV)/ImgH <1.2.

Further, the entrance pupil diameter EPD of the optical imaging lens and the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the fifth lens satisfy: 0.3 yarn EPD/TD <0.4.

Further, the effective focal length f of the optical imaging lens and the distance SD from the diaphragm to the image side surface of the fifth lens satisfy the following condition: 1-sD/f <1.2.

Further, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following condition: 0.2-and-f/(f 1+ f 2) <0.3.

Further, the effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy: 0.9-f/f 12<1.2.

Further, the combined focal length f45 of the fourth lens and the fifth lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: 0.5 sP 45/(f 4-f 5) <1.7.

Further, 0.4-f 4/(R7-R8) <0.5 is satisfied between an effective focal length f4 of the fourth lens, a radius of curvature R7 of an object-side surface of the fourth lens, and a radius of curvature R8 of an image-side surface of the fourth lens.

Further, a curvature radius R5 of the object-side surface of the third lens and a curvature radius R6 of the image-side surface of the third lens satisfy: -0.3< (R5-R6)/(R5 + R6) <0.

Further, a curvature radius R7 of the object-side surface of the fourth lens, a curvature radius R8 of the image-side surface of the fourth lens, a curvature radius R9 of the object-side surface of the fifth lens, and a curvature radius R10 of the image-side surface of the fifth lens satisfy: -0.1< (R7 + R8)/(R9 + R10) <0.4.

Further, a sum Σ AT of air spaces on the optical axis of the optical imaging lens between any adjacent two lenses of the first to fifth lenses, a sum Σ CT of thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, respectively, and an on-axis distance BFL from the image-side surface of the fifth lens to the imaging surface of the optical imaging lens satisfy: 0.8< (∑ AT + BFL)/. Σ CT <1.

Further, the thickness CT2 of the second lens on the optical axis of the optical imaging lens, the thickness CT3 of the third lens on the optical axis, and the thickness CT4 of the fourth lens on the optical axis satisfy: 0.9< (CT 2+ CT 3)/CT 4<1.1.

Further, a thickness CT3 of the third lens on the optical axis of the optical imaging lens and a thickness CT4 of the fourth lens on the optical axis satisfy: CT3/CT4<0.4.

Further, a sum Σ AT of air intervals on the optical axis of the optical imaging lens between any adjacent two lenses of the first to fifth lenses and an air interval T34 on the optical axis of the optical imaging lens of the third and fourth lenses satisfy: 0< -T34/sigma AT <0.1.

Further, the maximum refractive index Nmax of the optical imaging lens and the refractive index N3 of the third lens satisfy: nmax = N3.

Further, the maximum effective radius DT32 of the image-side surface of the third lens, the maximum effective radius DT42 of the image-side surface of the fourth lens, the maximum effective radius DT52 of the image-side surface of the fifth lens, and the maximum effective radius SR of the stop satisfy: 0.8< (DT 32-SR)/(DT 52-DT 42) <1.1.

Further, the on-axis distance SAG12 between the intersection point of the image-side surface of the first lens and the optical axis of the optical imaging lens to the effective radius vertex of the image-side surface of the first lens, the on-axis distance SAG22 between the intersection point of the image-side surface of the second lens and the optical axis of the optical imaging lens to the effective radius vertex of the image-side surface of the second lens, and the on-axis distance SAG32 between the intersection point of the image-side surface of the third lens and the optical axis of the optical imaging lens to the effective radius vertex of the image-side surface of the third lens satisfy: 0.9< (SAG 12+ SAG 22)/SAG 32<1.1.

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 of the optical imaging lens: a diaphragm; a first lens having a positive refractive power; a second lens having a positive refractive power; a third lens; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; a fifth lens; the effective focal length f of the optical imaging lens, half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens meet the following requirements: 1-Ap f tan (Semi-FOV)/ImgH <1.2; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 45 ° < Semi-FOV <60 °.

Further, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following conditions: 0.2-and-f/(f 1+ f 2) <0.3.

Further, 0.4< -f4/(R7-R8) <0.5 is satisfied between an effective focal length f4 of the fourth lens, a radius of curvature R7 of an object-side surface of the fourth lens, and a radius of curvature R8 of an image-side surface of the fourth lens.

Further, a curvature radius R7 of an object-side surface of the fourth lens, a curvature radius R8 of an image-side surface of the fourth lens, a curvature radius R9 of an object-side surface of the fifth lens, and a curvature radius R10 of an image-side surface of the fifth lens satisfy: -0.1< (R7 + R8)/(R9 + R10) <0.4.

Further, the sum Σ AT of the air intervals on the optical axis of the optical imaging lens between any two adjacent lenses of the first to fifth lenses, the sum Σ CT of the thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, respectively, and the axial distance BFL from the image side surface of the fifth lens to the imaging surface of the optical imaging lens satisfy: 0.8< (∑ AT + BFL)/. Σ CT <1.

Further, a sum Σ AT of air intervals on the optical axis of the optical imaging lens between any adjacent two lenses of the first to fifth lenses and an air interval T34 on the optical axis of the optical imaging lens of the third and fourth lenses satisfy: 0 s T34/sigma AT <0.1.

Further, the maximum effective radius DT32 of the image-side surface of the third lens, the maximum effective radius DT42 of the image-side surface of the fourth lens, the maximum effective radius DT52 of the image-side surface of the fifth lens, and the maximum effective radius SR of the diaphragm satisfy: 0.8< (DT 32-SR)/(DT 52-DT 42) <1.1.

By applying the technical scheme of the invention, the optical imaging lens sequentially comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side of the optical imaging lens; the first lens has positive focal power; the second lens has positive focal power; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy the following condition: 1.2 and then the ttl/ImgH is less than 1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 45 ° < Semi-FOV <60 °.

Through the reasonable distribution of the focal power of each lens, the aberration generated by the optical imaging lens is balanced, and the imaging quality of the optical imaging lens is greatly improved. The TTL/ImgH is limited within a reasonable range, so that the total length of the optical imaging lens can be limited, the optical imaging lens is ensured to have a larger image surface range, the miniaturization and the lightness and thinness of the optical imaging lens are ensured, the small, exquisite and light structure is favorable for being assembled on electronic products such as mobile phones, and the design freedom degree of the electronic products such as the mobile phones is increased. By limiting the maximum half field angle Semi-FOV to the range of 45 ° to 60 °, the optical imaging lens is enabled to capture an image in a larger angular range, so that the optical imaging lens can be used as a wide-angle lens. The arrangement enables the optical imaging lens to realize miniaturization and wide-angle shooting.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view showing a configuration of 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, a magnification chromatic aberration curve, an astigmatism curve, and a distortion 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, a magnification chromatic aberration curve, an astigmatism curve, and a distortion 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, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 11, respectively;

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

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

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, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 21, respectively;

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, a magnification chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens in fig. 26, respectively.

Wherein the figures include the following reference numerals:

STO, stop; e1, a first lens; s1, an object side surface of a first lens; s2, an image side surface of the first lens; e2, a second lens; s3, an object side surface of the second lens; s4, the image side surface of the second lens; e3, a third lens; s5, an object side surface of the third lens; s6, the image side surface of the third lens; e4, a fourth lens; s7, an object side surface of the fourth lens; s8, the image side surface of the fourth lens; e5, a fifth lens; s9, an object side surface of the fifth lens; s10, an image side surface of the fifth lens; e6, a filter plate; s11, an object side surface of the filter plate; s12, an image side surface of the filter plate; s13, imaging; s14, an image side surface of the filter plate; and S15, imaging.

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 accompanying drawings in conjunction with embodiments.

It is 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 invention.

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.

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.

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 becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be performed by determining whether or not the surface shape is concave or convex, based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) in accordance with the determination method of a person ordinarily skilled in the art. For the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

The invention provides an optical imaging lens, aiming at solving the problem that a mobile phone lens in the prior art is small in self-photographing view.

Example one

As shown in fig. 1 to 30, the optical imaging lens includes, in order from an object side to an image side, a stop, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; the first lens has positive focal power; the second lens has positive focal power; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy the following condition: 1.2<TTL/ImgH <1.5; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 45 ° < Semi-FOV <60 °.

Through the reasonable distribution of the focal power of each lens, the aberration generated by the optical imaging lens is balanced, and the imaging quality of the optical imaging lens is greatly improved. The TTL/ImgH is limited within a reasonable range, the total length of the optical imaging lens can be limited, the optical imaging lens is ensured to have a larger image surface range, the miniaturization and the lightness and thinness of the optical imaging lens are ensured, the small, exquisite and light structure is favorable for assembly on electronic products such as mobile phones, and meanwhile, the design freedom degree of the electronic products such as the mobile phones is increased. By limiting the maximum half field angle Semi-FOV to the range of 45 ° to 60 °, the optical imaging lens is enabled to capture an image in a larger angular range, so that the optical imaging lens can be used as a wide-angle lens. The arrangement enables the optical imaging lens to realize miniaturization and wide-angle shooting.

Preferably, an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens and a half ImgH of a diagonal length of the effective pixel area on the imaging surface satisfy: 1.25 were woven ttl/ImgH <1.45.

In the embodiment, the effective focal length f of the optical imaging lens, half ImgH of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, and the maximum half field angle Semi-FOV of the optical imaging lens satisfy: 1< -f tan (Semi-FOV)/ImgH <1.2. By limiting f tan (Semi-FOV)/ImgH within a reasonable range, the optical imaging lens has a sufficiently large field angle through reasonable matching of the effective focal length and the maximum half field angle of the optical imaging lens on the premise that the optical imaging lens has a large image plane, the wide-angle characteristic of the optical imaging lens is maintained, and miniaturization of the optical imaging lens is further ensured. Preferably, 1.05 tow f tan (Semi-FOV)/ImgH <1.18.

In the embodiment, the entrance pupil diameter EPD of the optical imaging lens and the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the fifth lens satisfy: 0.3<EPD/TD <0.4. By limiting the EPD/TD within a reasonable range, the optical imaging lens can be ensured to pass through enough luminous flux, so that the image plane has higher illumination, and good imaging quality can be kept in a dark environment. The distance between the object side surface of the first lens and the image side surface of the fifth lens is reasonably adjusted, so that the optical imaging lens is prevented from being long, meanwhile, the gap and the thickness between the lenses can be effectively adjusted, the whole miniaturization of the optical imaging lens is facilitated, the distortion and the chromatic aberration of a system can be better balanced, ghost image energy between the lenses is reduced, and the optical imaging lens is ensured to obtain better imaging quality. Preferably, 0.35 tow epd/TD <0.4.

In the embodiment, the effective focal length f of the optical imaging lens and the distance SD from the diaphragm to the image side surface of the fifth lens satisfy: 1-sD/f <1.2. The SD/f is limited within a reasonable range, so that the effective focal length of the optical imaging lens is controlled within a reasonable range, the range of the maximum half field angle is ensured, the requirements of overlarge focal power and too tight tolerance of the optical imaging lens are avoided, and the spherical aberration, astigmatism and the like generated by the optical imaging lens can be reduced. The distance from the diaphragm to the image side surface of the fifth lens is limited, the length of the optical imaging lens is limited, the position of the diaphragm in front of the optical imaging lens is determined, and collection and convergence of light rays by the optical imaging lens are facilitated. Preferably, 1.1-sD/f <1.2.

In this embodiment, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: 0.2-and-f/(f 1+ f 2) <0.3. Through the reasonable cooperation to the effective focal length of first lens and second lens, can complementary positive negative spherical aberration, coma and astigmatism that eliminate first lens and second lens and bring, dispersion and the colour difference that can effectively eliminate different wavelength simultaneously cause to promote whole optical imaging system's imaging quality, obtain good resolution. Preferably, 0.23-f/(f 1+ f 2) <0.3.

In the present embodiment, the effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens satisfy: 0.9-f/f 12<1.2. The effective focal length of the optical imaging lens is controlled within a reasonable range, the range of the maximum half field angle is ensured, and meanwhile, the combined focal length of the first lens and the second lens is restricted within a reasonable range, so that light rays are prevented from being greatly deflected after passing through the first lens and the second lens, the design and debugging of subsequent lenses are facilitated, and the spherical aberration, the coma aberration and the sensitivity degree of the lenses of the front two lenses can be effectively weakened. Preferably, 0.95-f/f 12<1.15.

In the present embodiment, the combined focal length f45 of the fourth lens and the fifth lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 0.5 sP 45/(f 4-f 5) <1.7. The combined focal length of the fourth lens and the fifth lens is restricted in a reasonable range, so that the sensitivity of the fourth lens and the fifth lens can be weakened, the strict tolerance requirement is avoided, the deflection of each field ray on the surfaces of the fourth lens and the fifth lens is smoother, and the ghost risk caused by total reflection of the rays can be effectively reduced. And the fourth lens and the fifth lens are matched to be linked with the whole optical imaging system, so that positive and negative spherical aberration, magnification chromatic aberration and the like under different fields of view can be better and complementarily eliminated. Preferably, 0.51-woven fabric f 45/(f 4-f 5) <1.65.

In the present embodiment, 0.4-but-4/(R7-R8) <0.5 is satisfied between the effective focal length f4 of the fourth lens, 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. The curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface of the fourth lens are reasonably distributed, so that the appearance of the fourth lens is more favorable for injection molding and assembling processes, the surface sensitivity of the fourth lens is reduced, and the matching of the two surfaces is favorable for the distribution of the focal power of the fourth lens and the deflection trend of light rays. The field curvature and distortion of the optical imaging system can be effectively balanced on the basis of the existing processing capability. Preferably, 0.45-f4/(R7-R8) <0.5.

In the present embodiment, a radius of curvature R5 of the object-side surface of the third lens and a radius of curvature R6 of the image-side surface of the third lens satisfy: -0.3< (R5-R6)/(R5 + R6) <0. The curvature radii of the image side surface of the third lens and the object side surface of the third lens are reasonably distributed, so that the curvature of the surface of the third lens is not too large or too small, the processing difficulty caused by too large field angle is avoided, meanwhile, the sensitivity of the third lens can be obviously reduced, the strict tolerance requirement and the process level are avoided, and the astigmatism, the field curvature and the like of the optical imaging lens are effectively slowed down. Preferably, -0.25< (R5-R6)/(R5 + R6) < -0.1.

In the present embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: -0.1< (R7 + R8)/(R9 + R10) <0.4. The distribution of the surface curvatures of the fourth lens and the fifth lens is reasonably distributed, so that the curvature difference of the optical surfaces of the fourth lens and the fifth lens is not too large, the rise of the lenses is controlled within a certain range, the deflection of light rays in the lenses can be reduced, the sensitivity of the lenses is reduced, the convergence of the light rays is facilitated, and the generation of total reflection and ghost images is avoided. Preferably, -0.1< (R7 + R8)/(R9 + R10) <0.38.

In the present embodiment, a sum Σ AT of air spaces on the optical axis of the optical imaging lens between any adjacent two lenses of the first to fifth lenses, a sum Σ CT of thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, respectively, and an on-axis distance BFL from the image-side surface of the fifth lens to the imaging surface of the optical imaging lens satisfy: 0.8< (∑ AT + BFL)/. Σ CT <1. Through restricting (Σ AT + BFL)/∑ CT in reasonable within range, can rationally distribute the air interval between five lenses to guarantee optical imaging lens's assembly process, avoid two lens interference problem that lead to too closely, still be favorable to slowing down light deflection, avoid single lens too thick simultaneously, be of value to lens thickness's rational distribution, can adjust optical imaging lens's curvature of field, reduce sensitive degree, weaken the ghost image energy between the lens. And the light imaging system is ensured to have enough optical back focus, so that the voice coil motor is convenient to install and debug. Preferably, 0.85< (∑ AT + BFL)/. Σ CT <0.95.

In the present embodiment, the thickness CT2 of the second lens on the optical axis of the optical imaging lens, the thickness CT3 of the third lens on the optical axis, and the thickness CT4 of the fourth lens on the optical axis satisfy: 0.9< (CT 2+ CT 3)/CT 4<1.1. By limiting the (CT 2+ CT 3)/CT 4 within a reasonable range, the thickness complementation of the second lens, the third lens and the fourth lens can be realized, a thin-thick form is formed, the negative and positive spherical aberration, the positive and negative astigmatism, the positive and negative distortion, the chromatic aberration and the like are well offset, the complementary buffering effect is good for extreme environments such as high and low temperatures, and the good temperature drift characteristic is shown. Preferably, 0.9< (CT 2+ CT 3)/CT 4<1.09.

In the present embodiment, a thickness CT3 of the third lens on the optical axis and a thickness CT4 of the fourth lens on the optical axis satisfy: CT3/CT4<0.4. By limiting CT3/CT4 within a reasonable range, the overall shape of the optical imaging lens is more balanced, thereby affecting the quality of the optical imaging lens. In addition, the distortion and the field curvature of the whole optical imaging system can be better adjusted, and the ghost and stray light risks caused by appearance problems of the third lens and the fourth lens are avoided. Preferably, 0.3-straw CT3/CT4 is less than 0.35.

In the present embodiment, a sum Σ AT of air intervals on the optical axis of the optical imaging lens between any adjacent two lenses of the first to fifth lenses and an air interval T34 on the optical axis of the optical imaging lens of the third and fourth lenses satisfy: 0< -T34/sigma AT <0.1. By limiting T34/Sigma AT within a reasonable range, enough clearance between the lenses is ensured, the installation of a spacer and a space ring is convenient, and the adjustment of optical parameters is also facilitated; by balancing the air gap between the third lens and the fourth lens, the light ray deflection and energy distribution between the two lenses can be reduced. The two are matched to effectively reduce the coma aberration and astigmatism of the optical imaging system, and the optical imaging system is greatly helpful for the stability of field curvature and MTF peak value. Preferably, 0.01 t34/Σ AT <0.1.

In the present embodiment, the refractive index N3 of the third lens and the maximum refractive index Nmax of the optical imaging lens satisfy: nmax = N3. The thickness of the third lens can be thinned by the arrangement, the third lens is matched with the front lens and the rear lens, the generation of deflection and total reflection of light is weakened, the chromatic dispersion and the complex chromatic aberration caused by different wavelengths can be effectively eliminated, and the lens CRA (Chief Ray Angle) can be better matched with a chip.

In the present embodiment, the maximum effective radius DT32 of the image-side surface of the third lens, the maximum effective radius DT42 of the image-side surface of the fourth lens, the maximum effective radius DT52 of the image-side surface of the fifth lens, and the maximum effective radius SR of the stop satisfy: 0.8< (DT 32-SR)/(DT 52-DT 42) <1.1. By limiting (DT 32-SR)/(DT 52-DT 42) within a reasonable range, on one hand, the vignetting value of the optical imaging system can be effectively controlled, marginal light rays with poor imaging quality are intercepted, and the resolution force and the relative illumination of an image plane are improved; on the other hand, the problem of large section difference caused by overlarge caliber difference between the fourth lens and the fifth lens, which causes the problem of eccentricity and inclination of the optical imaging lens, can be avoided, and the stability of assembly is ensured. Preferably, 0.82< (DT 32-SR)/(DT 52-DT 42) <1.09.

In this embodiment, the on-axis distance SAG12 between the intersection of the image-side surface of the first lens and the optical axis of the optical imaging lens and the effective radius vertex of the image-side surface of the first lens, the on-axis distance SAG22 between the intersection of the image-side surface of the second lens and the optical axis of the optical imaging lens and the effective radius vertex of the image-side surface of the second lens, and the on-axis distance SAG32 between the intersection of the image-side surface of the third lens and the optical axis of the optical imaging lens and the effective radius vertex of the image-side surface of the third lens satisfy: 0.9< (SAG 12+ SAG 22)/SAG 32<1.1. By limiting (SAG 12+ SAG 22)/SAG 32 within a reasonable range, the curvature radius difference of each lens can be avoided from being too large, and the uniformity of the size of the optical imaging lens is ensured. Through limiting the rise ratio, stray light can be effectively filtered, stray light of the optical imaging lens is improved, and actual processing assembly, total reflection weakening and imaging quality improvement are facilitated. Preferably, 0.9< (SAG 12+ SAG 22)/SAG 32<1.09.

Example two

As shown in fig. 1 to fig. 30, the optical imaging lens includes, in order from an object side to an image side, a stop, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; the first lens has positive focal power; the second lens has positive focal power; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the effective focal length f of the optical imaging lens, half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens meet the following requirements: 1-Ap f tan (Semi-FOV)/ImgH <1.2; the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 45 ° < Semi-FOV <60 °.

Through the reasonable distribution of the focal power of each lens, the aberration generated by the optical imaging lens is balanced, and the imaging quality of the optical imaging lens is greatly improved. By limiting f tan (Semi-FOV)/ImgH within a reasonable range, the optical imaging lens has a sufficiently large field angle through reasonable matching of the effective focal length and the maximum half field angle of the optical imaging lens on the premise that the optical imaging lens has a large image plane, the wide-angle characteristic of the optical imaging lens is maintained, and miniaturization of the optical imaging lens is further ensured. By limiting the maximum half field angle Semi-FOV to the range of 45 ° to 60 °, the optical imaging lens is enabled to capture an image in a larger angular range, so that the optical imaging lens can be used as a wide-angle lens. The arrangement enables the optical imaging lens to realize miniaturization and wide-angle shooting.

Preferably, the effective focal length f of the optical imaging lens, half ImgH of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens, and the maximum half field angle Semi-FOV of the optical imaging lens satisfy: 1.05 sP tan (Semi-FOV)/ImgH <1.18

In this embodiment, the entrance pupil diameter EPD of the optical imaging lens and the on-axis distance TD from the object-side surface of the first lens to the image-side surface of the fifth lens satisfy: 0.3 yarn EPD/TD <0.4. By limiting the EPD/TD within a reasonable range, the optical imaging lens can be ensured to pass through enough luminous flux, so that the image plane has higher illumination, and good imaging quality can be kept in a dark environment. The distance between the object side surface of the first lens and the image side surface of the fifth lens is reasonably adjusted, so that the optical imaging lens is prevented from being long, meanwhile, the gap and the thickness between the lenses can be effectively adjusted, the whole miniaturization of the optical imaging lens is facilitated, the distortion and the chromatic aberration of a system can be better balanced, ghost image energy between the lenses is reduced, and the optical imaging lens is ensured to obtain better imaging quality. Preferably, 0.35-plus epd/TD <0.4.

In this embodiment, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: 0.2-and-f/(f 1+ f 2) <0.3. Through the reasonable matching of the effective focal lengths of the first lens and the second lens, positive and negative spherical aberration, coma aberration and astigmatism brought by the first lens and the second lens can be complementarily eliminated, and meanwhile, chromatic dispersion and chromatic aberration caused by different wavelengths can be effectively eliminated, so that the imaging quality of the whole optical imaging system is improved, and good resolving power is obtained. Preferably, 0.23-f/(f 1+ f 2) <0.3.

In the present embodiment, 0.4-but-4/(R7-R8) <0.5 is satisfied between the effective focal length f4 of the fourth lens, 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. The curvature radius of the object side surface of the fourth lens and the curvature radius of the image side surface of the fourth lens are reasonably distributed, so that the appearance of the fourth lens is more favorable for injection molding and assembling processes, the surface sensitivity of the fourth lens is reduced, and the matching of the two surfaces is favorable for the distribution of the focal power of the fourth lens and the deflection trend of light rays. The field curvature and distortion of the optical imaging system can be effectively balanced on the basis of the existing processing capability. Preferably, 0.45-woven fabric f 4/(R7-R8) <0.5.

In the present embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: -0.1< (R7 + R8)/(R9 + R10) <0.4. The distribution of the surface curvatures of the fourth lens and the fifth lens is reasonably distributed, so that the curvature difference of the optical surfaces of the fourth lens and the fifth lens is not too large, the rise of the lenses is controlled within a certain range, the deflection of light rays in the lenses can be slowed down, the sensitivity of the lenses is reduced, the convergence of the light rays is facilitated, and the occurrence of total reflection and ghost images is avoided. Preferably, -0.1< (R7 + R8)/(R9 + R10) <0.38.

In this embodiment, a sum Σ AT of air intervals on the optical axis of the optical imaging lens between any two adjacent lenses of the first to fifth lenses, a sum Σ CT of thicknesses on the optical axis of the optical imaging lens of the first to fifth lenses, respectively, and an on-axis distance BFL from the image side surface of the fifth lens to the imaging surface of the optical imaging lens satisfy: 0.8< (∑ AT + BFL)/. Σ CT <1. Through restricting (Σ AT + BFL)/Σ CT in reasonable scope, can rationally distribute the air interval between five pieces of lens, in order to guarantee the assembly process of the optical imaging lens, avoid two lens interference problem that lead to too near, still be favorable to slowing down the light deflection, avoid single lens too thick AT the same time, the rational distribution of lens thickness is benefited, can adjust the field curvature of the optical imaging lens, reduce the degree of sensitivity, weaken the ghost image energy between the lenses. And the light imaging system is ensured to have enough optical back focus, so that the voice coil motor is convenient to install and debug. Preferably, 0.85< (∑ AT + BFL)/. Σ CT <0.95.

In the embodiment, the thickness CT2 of the second lens on the optical axis of the optical imaging lens, the thickness CT3 of the third lens on the optical axis and the thickness CT4 of the fourth lens on the optical axis satisfy: 0.9< (CT 2+ CT 3)/CT 4<1.1. By limiting the (CT 2+ CT 3)/CT 4 within a reasonable range, the thickness complementation of the second lens, the third lens and the fourth lens can be realized, a thin-thick form is formed, the negative and positive spherical aberration, the positive and negative astigmatism, the positive and negative distortion, the chromatic aberration and the like are well offset, the complementary buffering effect is good for extreme environments such as high and low temperatures, and the good temperature drift characteristic is shown. Preferably, 0.9< (CT 2+ CT 3)/CT 4<1.09.

In the present embodiment, a thickness CT3 of the third lens on the optical axis and a thickness CT4 of the fourth lens on the optical axis satisfy: CT3/CT4<0.4. By limiting CT3/CT4 within a reasonable range, the overall shape of the optical imaging lens is more balanced, thereby affecting the quality of the optical imaging lens. In addition, the distortion and the field curvature of the whole optical imaging system can be better adjusted, and the ghost and stray light risks caused by appearance problems of the third lens and the fourth lens are avoided. Preferably, 0.3-woven CT3/CT4 is <0.35.

In the present embodiment, a sum Σ AT of air intervals on the optical axis of the optical imaging lens between any adjacent two lenses of the first to fifth lenses and an air interval T34 on the optical axis of the optical imaging lens of the third and fourth lenses satisfy: 0 s T34/sigma AT <0.1. By limiting the T34/sigma AT within a reasonable range, enough clearance between the lenses is ensured, the installation of a spacer and a space ring is convenient, and the adjustment of optical parameters is facilitated; by balancing the air gap between the third lens and the fourth lens, the light ray deflection and energy distribution between the two lenses can be reduced. The two can effectively reduce the coma aberration and astigmatism of the optical imaging system, and is greatly helpful to the stability of the field curvature and the MTF peak value. Preferably, 0.01 t34/Σ AT <0.1.

In the present embodiment, the refractive index N3 of the third lens and the maximum refractive index Nmax of the optical imaging lens satisfy: nmax = N3. The thickness of the third lens can be thinned by the arrangement, the third lens is matched with the front lens and the rear lens, the generation of deflection and total reflection of light is weakened, meanwhile, chromatic dispersion and composite chromatic aberration caused by different wavelengths can be effectively eliminated, and the lens CRA (Chief Ray Angle) can be better matched with a chip.

In the present embodiment, the on-axis distance SAG12 between the intersection point of the image-side surface of the first lens and the optical axis of the optical imaging lens to the effective radius vertex of the image-side surface of the first lens, the on-axis distance SAG22 between the intersection point of the image-side surface of the second lens and the optical axis of the optical imaging lens to the effective radius vertex of the image-side surface of the second lens, and the on-axis distance SAG32 between the intersection point of the image-side surface of the third lens and the optical axis of the optical imaging lens to the effective radius vertex of the image-side surface of the third lens satisfy: 0.9< (SAG 12+ SAG 22)/SAG 32<1.1. By limiting (SAG 12+ SAG 22)/SAG 32 within a reasonable range, the large difference of the curvature radius of each lens can be avoided, and the uniformity of the size of the optical imaging lens is ensured. Through limiting the rise ratio, stray light can be effectively filtered, stray light of the optical imaging lens is improved, and actual processing assembly, total reflection weakening and imaging quality improvement are facilitated. Preferably, 0.9< (SAG 12+ SAG 22)/SAG 32<1.09.

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 in the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface shape, the central thickness of each lens, the axial distance between each lens and the like, the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The optical imaging lens also has large aperture and large field angle. The advantages of ultra-thin and good imaging quality can meet the miniaturization requirement of intelligent electronic products.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in 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 center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, 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 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 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.

The first lens element E1 has positive refractive power, and the object-side surface S1 and the image-side surface S2 of the first lens element are convex and concave, respectively. The second lens element E2 has positive refractive power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is convex. The third lens element E3 has negative refractive power, and the object-side surface S5 and the image-side surface S6 thereof are concave and convex, respectively. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex, respectively. The fifth lens element E5 has a negative refractive power, and the object-side surface S9 and the image-side surface S10 of the fifth lens element are concave. Filter E6 has an object side surface S11 of the filter and an image side surface S12 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S13 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 maximum half field angle Semi-FOV of the optical imaging lens is 49.24 °, the total length TTL of the optical imaging lens is 3.97mm, and the image height ImgH is 2.90mm.

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

TABLE 1

In example one, 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 surfaces, and the surface shape of each aspheric surface lens can be defined by, but is not limited to, the following aspheric surface 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 =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 values A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical mirror surfaces S1-S10 in example one.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-6.3167E-02

-4.2676E-02

-1.6995E+00

2.6720E+01

-2.2985E+02

1.1269E+03

-3.1874E+03

S2

-1.1038E-01

-5.0898E-01

4.5263E+00

-4.2602E+01

2.3291E+02

-7.9262E+02

1.6308E+03

S3

-2.1118E-01

8.4047E-01

-1.5745E+01

1.2944E+02

-6.7846E+02

2.2259E+03

-4.4428E+03

S4

-1.0614E-01

-2.4938E-01

3.2664E-01

-5.4224E+00

2.6167E+01

-5.9968E+01

7.3998E+01

S5

1.2537E+00

-3.1864E+00

5.6229E+00

-1.5062E+01

5.1042E+01

-1.0204E+02

1.0833E+02

S6

7.8910E-01

-1.2752E+00

9.2876E-01

-1.5361E+00

6.8386E+00

-1.2539E+01

1.1012E+01

S7

-1.9129E-01

2.4885E-01

-3.6544E-01

3.5949E-01

-2.0956E-01

6.9426E-02

-1.2562E-02

S8

-1.6701E-01

5.9284E-01

-8.2417E-01

7.2173E-01

-4.0009E-01

1.3778E-01

-2.8454E-02

S9

-3.6976E-01

5.1914E-01

-6.5446E-01

6.0556E-01

-2.8187E-01

-3.4357E-02

1.2869E-01

S10

-2.6897E-01

2.1723E-01

-1.4178E-01

7.6331E-02

-3.1688E-02

9.6486E-03

-2.2817E-03

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

4.8607E+03

-3.0861E+03

0.0000E+00

S2

-1.8542E+03

9.1831E+02

0.0000E+00

S3

4.8876E+03

-2.2379E+03

0.0000E+00

2.9595E+03

S4

-4.9180E+01

1.4587E+01

0.0000E+00

S5

-5.7648E+01

1.1929E+01

0.0000E+00

S6

-4.7809E+00

8.3164E-01

0.0000E+00

S7

1.1111E-03

-3.4184E-05

0.0000E+00

S8

3.2204E-03

-1.5335E-04

0.0000E+00

S9

-8.1733E-02

2.8408E-02

-6.0828E-03

8.0184E-04

-5.9936E-05

1.9502E-06

0.0000E+00

S10

5.0288E-04

-1.1226E-04

2.0859E-05

-2.5931E-06

1.8298E-07

-5.5077E-09

0.0000E+00

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 a chromatic aberration of magnification curve of the optical imaging lens of the first example, which represents the deviation of different image heights on the imaging plane after the light passes through the optical imaging lens. Fig. 4 shows astigmatism curves of the optical imaging lens of example one, which represent meridional field curvature and sagittal field curvature. Fig. 5 shows distortion curves of the optical imaging lens of example one, which indicate distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 2 to 5, the optical imaging lens according to 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 and the following examples, a description of portions 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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.

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

In this example, the total effective focal length f of the optical imaging lens is 2.62mm, the maximum half field angle Semi-FOV of the optical imaging lens is 50.34 °, the total length TTL of the optical imaging lens is 3.96mm, and the image height ImgH is 2.80mm.

Table 3 shows a basic structural parameter table of the optical imaging lens of example two, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all 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 two above.

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 a chromatic aberration of magnification curve of the optical imaging lens of example two, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 9 shows astigmatism curves of the optical imaging lens of example two, which represent meridional field curvature and sagittal field curvature. Fig. 10 shows distortion curves of the optical imaging lens of example two, which represent distortion magnitude values corresponding to different angles of view.

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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.

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

In this example, the total effective focal length f of the optical imaging lens is 2.68mm, the maximum half field angle Semi-FOV of the optical imaging lens is 51.64 °, the total length TTL of the optical imaging lens is 3.95mm, and the image height ImgH is 3.05mm.

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, thickness/distance, focal length, and effective radius are all 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 three above.

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 a chromatic aberration of magnification curve of the optical imaging lens of example three, which represents the deviation of different image heights on the imaging plane after the light passes through the optical imaging lens. Fig. 14 shows astigmatism curves of the optical imaging lens of example three, which represent meridional field curvature and sagittal field curvature. Fig. 15 shows distortion curves of the optical imaging lens of example three, which represent distortion magnitude values corresponding to different angles of view.

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

In this example, the total effective focal length f of the optical imaging lens is 2.48mm, the maximum half field angle Semi-FOV of the optical imaging lens is 51.30 °, the total length TTL of the optical imaging lens is 3.96mm, and the image height ImgH is 2.88mm.

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, the thickness/distance, the focal length, and the effective radius are all 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 four above.

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-1.3352E-01

1.1251E-01

-6.6476E+00

8.1573E+01

-6.6992E+02

3.5037E+03

-1.1194E+04

S2

-2.7877E-01

-8.9174E-02

-1.1499E+00

-2.8682E+00

8.5322E+01

-5.5050E+02

1.7572E+03

S3

-3.1047E-01

1.4799E+00

-1.8557E+01

1.2262E+02

-5.1133E+02

1.3348E+03

-2.1105E+03

S4

-1.6670E-01

2.9011E-01

-2.8495E+00

6.9068E+00

-5.2186E+00

-1.5834E+01

5.0447E+01

S5

1.1193E+00

-3.1126E-01

-1.8211E+01

9.2948E+01

-2.5029E+02

4.2032E+02

-4.3810E+02

S6

7.9119E-01

-3.3969E-02

-7.9095E+00

2.6830E+01

-4.6058E+01

4.7841E+01

-3.0599E+01

S7

2.9752E-02

7.6778E-02

-8.2213E-01

1.7905E+00

-2.1439E+00

1.6751E+00

-9.0466E-01

S8

-1.0095E-01

1.2094E+00

-2.3556E+00

2.0483E+00

-5.2250E-01

-5.6379E-01

6.3159E-01

S9

-1.2831E-02

-3.5279E-01

8.6958E-01

-1.7666E+00

2.2171E+00

-1.6079E+00

6.3527E-01

S10

-2.6828E-01

2.5991E-01

-2.3473E-01

1.3794E-01

-2.1233E-02

-3.3161E-02

2.9643E-02

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

1.9721E+04

-1.4523E+04

0.0000E+00

S2

-2.8474E+03

1.8964E+03

0.0000E+00

S3

1.8565E+03

-6.9632E+02

0.0000E+00

S4

-5.7323E+01

2.4350E+01

0.0000E+00

S5

2.5807E+02

-6.5357E+01

0.0000E+00

S6

1.1170E+01

-1.7859E+00

0.0000E+00

S7

3.4085E-01

-8.7758E-02

1.4664E-02

-1.4278E-03

6.1311E-05

0.0000E+00

S8

-3.0438E-01

8.5113E-02

-1.4251E-02

1.3302E-03

-5.3378E-05

0.0000E+00

S9

-7.9993E-02

-4.5465E-02

2.6860E-02

-6.8000E-03

9.6284E-04

-7.4222E-05

2.4378E-06

S10

-1.2712E-02

3.3383E-03

-5.5709E-04

5.6905E-05

-3.0978E-06

4.8910E-08

1.6747E-09

TABLE 8

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

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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.

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

In this example, the total effective focal length f of the optical imaging lens is 2.39mm, the maximum half field angle Semi-FOV of the optical imaging lens is 53.64 °, the total length TTL of the optical imaging lens is 3.91mm, and the image height ImgH is 2.90mm.

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, focal length, and effective radius 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 five above.

Watch 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 a chromatic aberration of magnification curve of the optical imaging lens of example five, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 24 shows astigmatism curves of the optical imaging lens of example five, which represent meridional field curvature and sagittal field curvature. Fig. 25 shows distortion curves of the optical imaging lens of example five, which represent distortion magnitude values corresponding to different angles of view.

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: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6, and image plane S13.

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

In this example, the total effective focal length f of the optical imaging lens is 2.35mm, the maximum half field angle Semi-FOV of the optical imaging lens is 55.32 °, the total length TTL of the optical imaging lens is 3.89mm, and the image height ImgH is 2.96mm.

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, focal length, and effective radius are all millimeters (mm).

TABLE 11

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

Flour mark

A4

A6

A8

A10

A12

A14

A16

S1

-1.2797E-01

-2.6677E-01

4.7083E-01

5.1853E+00

-1.9528E+02

1.8294E+03

-8.1504E+03

S2

-2.5016E-01

-6.5688E-01

6.6359E+00

-6.6503E+01

4.0678E+02

-1.5670E+03

3.7323E+03

S3

-3.1466E-01

1.5091E+00

-1.8811E+01

1.2198E+02

-5.0077E+02

1.2873E+03

-2.0040E+03

S4

-1.3621E-01

5.2298E-02

-1.2059E+00

-1.9607E+00

2.3685E+01

-7.2926E+01

1.1810E+02

S5

1.2316E+00

-1.3033E+00

-1.4068E+01

7.9411E+01

-2.1506E+02

3.5989E+02

-3.7835E+02

S6

9.0022E-01

-5.8256E-01

-7.1908E+00

2.7411E+01

-4.8803E+01

5.1413E+01

-3.3160E+01

S7

9.4025E-02

-7.0135E-02

-6.3040E-01

1.5914E+00

-1.9306E+00

1.4634E+00

-7.5002E-01

S8

-7.7243E-02

1.2447E+00

-2.4295E+00

2.0046E+00

-3.2180E-01

-7.9270E-01

7.7538E-01

S9

1.2518E-01

-6.0150E-01

7.2773E-01

-3.8585E-01

-5.2305E-01

1.3805E+00

-1.4453E+00

S10

-1.3861E-01

-1.4842E-01

4.7222E-01

-6.5441E-01

5.9666E-01

-3.8347E-01

1.7736E-01

Flour mark

A18

A20

A22

A24

A26

A28

A30

S1

1.7763E+04

-1.5110E+04

0.0000E+00

S2

-5.0102E+03

2.9328E+03

0.0000E+00

S3

1.7372E+03

-6.4272E+02

0.0000E+00

S4

-1.0184E+02

3.6809E+01

0.0000E+00

S5

2.2859E+02

-6.0220E+01

0.0000E+00

S6

1.2251E+01

-1.9983E+00

0.0000E+00

S7

2.6543E-01

-6.4010E-02

1.0032E-02

-9.1930E-04

3.7290E-05

0.0000E+00

S8

-3.6050E-01

9.9044E-02

-1.6394E-02

1.5166E-03

-6.0401E-05

0.0000E+00

S9

8.9932E-01

-3.6454E-01

9.8984E-02

-1.7908E-02

2.0750E-03

-1.3950E-04

4.1425E-06

S10

-5.9363E-02

1.4325E-02

-2.4588E-03

2.9193E-04

-2.2743E-05

1.0443E-06

-2.1401E-08

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 a chromatic aberration of magnification curve of the optical imaging lens of example six, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens. Fig. 29 shows astigmatism curves of the optical imaging lens of example six, which represent meridional field curvature and sagittal field curvature. Fig. 30 shows distortion curves of the optical imaging lens of example six, which represent distortion magnitude values corresponding to different angles of view.

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.

Conditions/examples	1	2	3	4	5	6
							TTL/ImgH	1.37	1.41	1.30	1.37	1.35	1.31
f*tan(Semi-FOV)/ImgH	1.08	1.13	1.11	1.07	1.12	1.15
							EPD/TD	0.37	0.37	0.39	0.37	0.38	0.38
SD/f	1.14	1.14	1.12	1.16	1.17	1.19
							f/(f1+f2)	0.29	0.28	0.29	0.27	0.26	0.26
f/f12	1.10	1.08	1.08	1.00	0.98	0.99
							f45/(f4-f5)	1.49	1.14	1.61	0.64	0.54	0.52
f4/(R7-R8)	0.48	0.49	0.48	0.48	0.48	0.48
							(R5-R6)/(R5+R6)	-0.19	-0.20	-0.18	-0.22	-0.23	-0.23
(R7+R8)/(R9+R10)	-0.08	-0.04	-0.09	0.31	0.36	0.36
							(∑AT+BFL)/∑CT	0.91	0.88	0.89	0.91	0.90	0.87
(CT2+CT3)/CT4	1.04	0.99	1.07	0.91	0.91	0.92
							CT3/CT4	0.33	0.32	0.32	0.33	0.32	0.31
T34/∑AT	0.04	0.03	0.04	0.05	0.05	0.05
							(DT32-SR)/(DT52-DT42)	0.89	1.03	0.84	1.03	1.03	0.91
(SAG12+SAG22)/SAG32	1.06	1.00	1.06	0.91	1.02	1.07

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

Example parameters	1	2	3	4	5	6
							f1(mm)	5.71	5.70	5.65	4.99	5.19	5.20
f2(mm)	3.63	3.56	3.68	4.19	3.96	3.81
							f3(mm)	-4.20	-3.93	-4.38	-3.22	-3.05	-2.97
f4(mm)	2.13	2.14	2.01	2.02	2.05	2.04
							f5(mm)	-2.11	-2.37	-1.97	-2.99	-3.41	-3.49
f(mm)	2.70	2.62	2.68	2.48	2.39	2.35
							TTL(mm)	3.97	3.96	3.95	3.96	3.91	3.89
ImgH(mm)	2.90	2.80	3.05	2.88	2.90	2.96
							Semi-FOV(°)	49.24	50.34	51.64	51.30	53.64	55.32

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, but 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 exemplary 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 only five lenses, in order from an object side to an image side of the optical imaging lens:

a diaphragm;

a first lens having a positive optical power;

a second lens having a positive optical power;

a third lens having a negative optical power;

the fourth lens has positive focal power, the object-side surface of the fourth lens is a convex surface, and the image-side surface of the fourth lens is a convex surface;

a fifth lens having a negative optical power;

the axial distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens meet the following conditions: 1.2 and then the ttl/ImgH is less than 1.5;

the maximum half field angle Semi-FOV of the optical imaging lens meets the following requirements: 45 ° < Semi-FOV <60 °;

the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens satisfy: -0.3< (R5-R6)/(R5 + R6) <0;

the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens satisfy that: -0.1< (R7 + R8)/(R9 + R10) <0.4.

2. The optical imaging lens according to claim 1, wherein the effective focal length f of the optical imaging lens, half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical imaging lens, and the maximum half field angle Semi-FOV of the optical imaging lens satisfy: 1< -f tan (Semi-FOV)/ImgH <1.2.

3. The optical imaging lens of claim 1, wherein an on-axis distance TD between an object-side surface of the first lens and an image-side surface of the fifth lens satisfies an entrance pupil diameter EPD of the optical imaging lens: 0.3 yarn EPD/TD <0.4.

4. The optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens and the distance SD from the diaphragm to the image side surface of the fifth lens satisfy: 1< -SD/f <1.2.

5. The optical imaging lens according to claim 1, wherein the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: 0.2-and-f/(f 1+ f 2) <0.3.

6. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens and a combined focal length f12 of the first lens and the second lens satisfy: 0.9-f/f 12<1.2.

7. The optical imaging lens of claim 1, wherein a combined focal length f45 of the fourth lens and the fifth lens, an effective focal length f4 of the fourth lens and an effective focal length f5 of the fifth lens satisfy: 0.5 sP 45/(f 4-f 5) <1.7.

8. The optical imaging lens of claim 1, wherein an effective focal length f4 of the fourth lens, a radius of curvature R7 of an object-side surface of the fourth lens, and a radius of curvature R8 of an image-side surface of the fourth lens satisfy 0.4-f4/(R7-R8) <0.5.

9. The optical imaging lens according to claim 1, wherein a sum Σ AT of air spaces on an optical axis of the optical imaging lens between any adjacent two lenses among the first to fifth lenses, a sum Σ CT of thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, respectively, and an on-axis distance BFL from an image-side surface of the fifth lens to an imaging surface of the optical imaging lens satisfy: 0.8< (∑ AT + BFL)/. Σ CT <1.

10. The optical imaging lens of claim 1, wherein a thickness CT2 of the second lens on an optical axis of the optical imaging lens, a thickness CT3 of the third lens on the optical axis, and a thickness CT4 of the fourth lens on the optical axis satisfy: 0.9< (CT 2+ CT 3)/CT 4<1.1.

11. The optical imaging lens according to claim 1, wherein a thickness CT3 of the third lens on an optical axis of the optical imaging lens and a thickness CT4 of the fourth lens on the optical axis satisfy: CT3/CT4<0.4.

12. The optical imaging lens of claim 1, wherein a sum Σ AT of air intervals on the optical axis of the optical imaging lens between any adjacent two lenses among the first lens to the fifth lens and an air interval T34 on the optical axis of the optical imaging lens of the third lens and the fourth lens satisfy: 0< -T34/sigma AT <0.1.

13. The optical imaging lens according to claim 1, wherein the refractive index N3 of the third lens and the maximum refractive index Nmax of the optical imaging lens satisfy: nmax = N3.

14. The optical imaging lens according to claim 1, wherein the maximum effective radius DT32 of the image-side surface of the third lens, the maximum effective radius DT42 of the image-side surface of the fourth lens, the maximum effective radius DT52 of the image-side surface of the fifth lens, and the maximum effective radius SR of the stop satisfy: 0.8< (DT 32-SR)/(DT 52-DT 42) <1.1.

15. The optical imaging lens of claim 1, wherein an on-axis distance SAG12 from an intersection of the image-side surface of the first lens and the optical axis of the optical imaging lens to an effective radius vertex of the image-side surface of the first lens, and an on-axis distance SAG22 from an intersection of the image-side surface of the second lens and the optical axis of the optical imaging lens to an effective radius vertex of the image-side surface of the second lens and an on-axis distance SAG32 from an intersection of the image-side surface of the third lens and the optical axis of the optical imaging lens to an effective radius vertex of the image-side surface of the third lens satisfy: 0.9< (SAG 12+ SAG 22)/SAG 32<1.1.

16. An optical imaging lens, comprising only five lenses, in order from an object side to an image side of the optical imaging lens:

a diaphragm;

a first lens having a positive optical power;

a second lens having a positive optical power;

a third lens having a negative optical power;

a fifth lens having a negative optical power;

the effective focal length f of the optical imaging lens, half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens meet the following conditions: 1< -f tan (Semi-FOV)/ImgH <1.2;

17. The optical imaging lens of claim 16, wherein an on-axis distance TD between an object-side surface of the first lens and an image-side surface of the fifth lens satisfies an entrance pupil diameter EPD of the optical imaging lens: 0.3 yarn EPD/TD <0.4.

18. The optical imaging lens of claim 16, wherein the effective focal length f of the optical imaging lens and the distance SD from the diaphragm to the image side surface of the fifth lens satisfy: 1< -SD/f <1.2.

19. The optical imaging lens of claim 16, wherein the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f2 of the second lens satisfy: 0.2-and-f/(f 1+ f 2) <0.3.

20. The optical imaging lens of claim 16, wherein an effective focal length f of the optical imaging lens and a combined focal length f12 of the first lens and the second lens satisfy: 0.9-f/f 12<1.2.

21. The optical imaging lens of claim 16, wherein a combined focal length f45 of the fourth lens and the fifth lens, an effective focal length f4 of the fourth lens and an effective focal length f5 of the fifth lens satisfy: 0.5 sP 45/(f 4-f 5) <1.7.

22. The optical imaging lens according to claim 16, wherein an effective focal length f4 of the fourth lens, a radius of curvature R7 of an object side surface of the fourth lens, and a radius of curvature R8 of an image side surface of the fourth lens satisfy 0.4-f 4/(R7-R8) <0.5.

23. The optical imaging lens of claim 16, wherein a sum Σ AT of air spaces on an optical axis of the optical imaging lens between any two adjacent lenses among the first to fifth lenses, a sum Σ CT of thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, respectively, and an on-axis distance BFL from an image-side surface of the fifth lens to an imaging surface of the optical imaging lens satisfy: 0.8< (∑ AT + BFL)/. Σ CT <1.

24. The optical imaging lens of claim 16, wherein a thickness CT2 of the second lens on an optical axis of the optical imaging lens, a thickness CT3 of the third lens on the optical axis, and a thickness CT4 of the fourth lens on the optical axis satisfy: 0.9< (CT 2+ CT 3)/CT 4<1.1.

25. The optical imaging lens of claim 16, wherein a thickness CT3 of the third lens on an optical axis of the optical imaging lens and a thickness CT4 of the fourth lens on the optical axis satisfy: CT3/CT4<0.4.

26. The optical imaging lens of claim 16, wherein a sum Σ AT of air intervals on the optical axis of the optical imaging lens between any adjacent two lenses among the first to fifth lenses and an air interval T34 on the optical axis of the optical imaging lens between the third lens and the fourth lens satisfy: 0< -T34/sigma AT <0.1.

27. The optical imaging lens according to claim 16, wherein the refractive index N3 of the third lens and the maximum refractive index Nmax of the optical imaging lens satisfy: nmax = N3.

28. The optical imaging lens of claim 16, wherein the maximum effective radius DT32 of the image-side surface of the third lens, the maximum effective radius DT42 of the image-side surface of the fourth lens, the maximum effective radius DT52 of the image-side surface of the fifth lens, and the maximum effective radius SR of the stop satisfy: 0.8< (DT 32-SR)/(DT 52-DT 42) <1.1.

29. The optical imaging lens of claim 16, wherein an on-axis distance SAG12 from an intersection point of the image-side surface of the first lens and the optical axis of the optical imaging lens to an effective radius vertex of the image-side surface of the first lens, and an on-axis distance SAG22 from an intersection point of the image-side surface of the second lens and the optical axis of the optical imaging lens to an effective radius vertex of the image-side surface of the second lens, and an on-axis distance SAG32 from an intersection point of the image-side surface of the third lens and the optical axis of the optical imaging lens to an effective radius vertex of the image-side surface of the third lens satisfy: 0.9< (SAG 12+ SAG 22)/SAG 32<1.1.