CN116679422A

CN116679422A - Optical imaging lens

Info

Publication number: CN116679422A
Application number: CN202310804317.XA
Authority: CN
Inventors: 朱晓晓; 徐武超; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2023-09-01
Also published as: CN113759526A; CN113759526B

Abstract

The invention provides an optical imaging lens. The imaging lens sequentially comprises from an object side to an image side: the first lens is provided with positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having negative optical power; a seventh lens element with positive refractive power having a convex object-side surface and a concave image-side surface; an eighth lens with negative focal power, wherein the object side surface of the eighth lens is a convex surface; wherein the abbe number V1 of the first lens satisfies: 60< V1<90; the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy the following conditions: 7.0mm < f tan (FOV/2) <9.0mm. The invention solves the problem of poor imaging quality of the optical imaging lens in the prior art.

Description

Optical imaging lens

The invention is a divisional application of an invention patent with the application number of 202111249318.X and the name of optical imaging lens, wherein the application date is 10/26 of 2021.

Technical Field

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

Background

Along with the common popularization of mobile phone camera shooting, the functions of mobile phone camera shooting are more and more varied, and the design requirements of various large terminal manufacturers on lenses are higher and higher. Currently, three lenses and four lenses are generally carried on a terminal product, one of the lenses is a main camera lens, and imaging quality of manufacturers for the main camera lens is higher and higher.

That is, the optical imaging lens in the prior art has a problem of poor imaging quality.

Disclosure of Invention

The invention mainly aims to provide an optical imaging lens so as to solve the problem that the optical imaging lens in the prior art has poor imaging quality.

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 of the optical imaging lens to an image side of the optical imaging lens: the first lens is provided with positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having negative optical power; a seventh lens element with positive refractive power having a convex object-side surface and a concave image-side surface; an eighth lens with negative focal power, wherein the object side surface of the eighth lens is a convex surface; wherein the abbe number V1 of the first lens satisfies: 60< V1<90; the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy the following conditions: 7.0mm < f tan (FOV/2) <9.0mm.

Further, the refractive index N2 of the second lens and the refractive index N3 of the third lens satisfy: 3.1< N2+N3<3.7.

Further, the effective focal length f1 of the first lens element, the radius of curvature R1 of the object-side surface of the first lens element, and the radius of curvature R2 of the image-side surface of the first lens element satisfy: 0.8< (R1+R2)/f 1<1.5.

Further, the effective focal length f4 of the fourth lens, the effective focal length f2 of the second lens and the effective focal length f6 of the sixth lens satisfy: 0.6< (f2+f4)/f6 <1.6.

Further, the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens satisfy: 0.3< f 3/(f5+f7) <1.6.

Further, the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 4.5< (R3+R4)/(R3-R4) <7.5.

Further, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy: 1.1< R6/R5<1.6.

Further, the effective focal length f8 of the eighth lens, the radius of curvature R15 of the object-side surface of the eighth lens, and the radius of curvature R16 of the image-side surface of the eighth lens satisfy: 0.8< (R16-R15)/f 8<5.6.

Further, the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 9.0< f 12/(CT1+CT2) <16.0.

Further, the combined focal length f67 of the sixth lens and the seventh lens, the air space T34 of the third lens and the fourth lens on the optical axis, and the air space T78 of the seventh lens and the eighth lens on the optical axis satisfy: 4.0< f 67/(t34+t78) <5.3.

Further, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 0.8< (ET 4+ ET 5)/ET 6<1.5.

Further, an on-axis distance SAG82 between an intersection point of the image side surface of the eighth lens and the optical axis and an apex of the effective radius of the image side surface of the eighth lens, an on-axis distance SAG81 between an intersection point of the object side surface of the eighth lens and the optical axis and an apex of the effective radius of the object side surface of the eighth lens, an on-axis distance SAG72 between an intersection point of the image side surface of the seventh lens and the optical axis and an apex of the effective radius of the image side surface of the seventh lens, and an on-axis distance SAG71 between an intersection point of the object side surface of the seventh lens and the optical axis and an apex of the effective radius of the object side surface of the seventh lens satisfy: 1.2< (SAG81+SAG82)/(SAG71+SAG72) <1.9.

According to another aspect of the present invention, there is provided an optical imaging lens comprising, in order from an object side of the optical imaging lens to an image side of the optical imaging lens: the first lens is provided with positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having negative optical power; a seventh lens element with positive refractive power having a convex object-side surface and a concave image-side surface; an eighth lens with negative focal power, wherein the object side surface of the eighth lens is a convex surface; wherein the abbe number V1 of the first lens satisfies: 60< V1<90; the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 9.0< f 12/(CT1+CT2) <16.0.

By applying the technical scheme of the invention, the optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens along the object side of the optical imaging lens to the image side of the optical imaging lens, wherein the first lens has positive focal power, the object side of the first lens is a convex surface, and the image side of the first lens is a concave surface; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the seventh lens has positive focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; the eighth lens has negative focal power, and the object side surface of the eighth lens is a convex surface; wherein the abbe number V1 of the first lens satisfies: 60< V1<90; the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy the following conditions: 7.0mm < f tan (FOV/2) <9.0mm.

The positive and negative distribution of the focal power of each lens of the optical imaging lens is reasonably controlled, so that the low-order aberration of the optical imaging lens can be effectively balanced, the sensitivity of the tolerance of the optical imaging lens can be reduced, the miniaturization of the optical imaging lens is kept, and the imaging quality of the optical imaging lens is ensured. The Abbe number of the first lens is controlled in a reasonable range, so that the dispersion degree of the optical imaging lens can be reasonably controlled, the chromatic aberration correcting capability of the optical imaging lens is improved, and the optical imaging lens can achieve a better imaging effect. The Abbe number of the first lens is controlled to reasonably control the chromatic dispersion degree of the system, improve the chromatic aberration correcting capacity and realize a better imaging effect; the optical imaging lens has the characteristic of large image plane by restraining the maximum half field angle and the effective focal length of the optical imaging lens.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 is a schematic view showing the structure of an optical imaging lens according to an example one of the present application;

Fig. 2 to 5 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, respectively;

fig. 6 is a schematic diagram showing the structure of an optical imaging lens according to example two of the present invention;

fig. 7 to 10 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, respectively;

fig. 11 is a schematic view showing the structure of 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 magnification chromatic aberration curve of the optical imaging lens in fig. 11, respectively;

fig. 16 is a schematic view showing the structure of 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 magnification chromatic aberration curve of the optical imaging lens in fig. 16, respectively;

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

fig. 22 to 25 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. 21, respectively.

Wherein the above figures include the following reference numerals:

STO and diaphragm; 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, the object side surface of the second lens; s4, an image side surface of the second lens; e3, a third lens; s5, the object side surface of the third lens is provided; s6, an image side surface of the third lens; e4, a fourth lens; s7, an object side surface of the fourth lens; s8, an image side surface of the fourth lens is provided; e5, a fifth lens; s9, an object side surface of the fifth lens; s10, an image side surface of the fifth lens; e6, a sixth lens;

s11, an object side surface of the sixth lens; s12, an image side surface of the sixth lens; e7, seventh lens; s13, an object side surface of the seventh lens; s14, an image side surface of the seventh lens; e8, an eighth lens; s15, an object side surface of the eighth lens; s16, an image side surface of the eighth lens; e9, a filter; s17, the object side surface of the filter; s18, an image side surface of the filter; s19, an imaging surface.

Detailed Description

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

It is noted that 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 unless otherwise indicated.

In the present application, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present application.

It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, 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 convenience of explanation. Specifically, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are 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, then 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 near the object side becomes the object side of the lens, and the surface of each lens near the image side is called the image side of the lens. The determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). In 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 image side, the concave surface is determined when the R value is positive, and the convex surface is determined when the R value is negative.

With the development of the field of mobile phone camera shooting, the competition of mobile phone lenses is larger and larger, and the design requirements of large terminal manufacturers on the lenses are higher and higher. Especially on the main shot of the high-end flagship model, the requirements of the high-end flagship model on the characteristics of large wide angle, large aperture, large image plane, high imaging quality and the like are met, meanwhile, the adverse effect caused by the environmental temperature can be better optimized, and the system reliability and tolerance are improved. Compared with the resin material, the glass material has wider refractive index range and excellent optical performance; and its thermal expansion coefficient is small, and the back focal length of the optical system is less changed with temperature. The invention aims to provide an eight-piece type large-image-surface, large-wide-angle, large-aperture and high-imaging-quality glass-plastic hybrid optical imaging lens, which can better meet the application requirements of a main camera on a next-generation high-end smart phone.

The invention provides an optical imaging lens for solving the problem that an optical imaging lens in the prior art is poor in imaging quality.

Example 1

As shown in fig. 1 to 25, the optical imaging lens sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens along an object side of the optical imaging lens to an image side of the optical imaging lens, wherein the first lens has positive optical power, an object side surface of the first lens is a convex surface, and an image side surface of the first lens is a concave surface; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the seventh lens has positive focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; the eighth lens has negative focal power, and the object side surface of the eighth lens is a convex surface; wherein the abbe number V1 of the first lens satisfies: 60< V1<90; the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy the following conditions: 7.0mm < f tan (FOV/2) <9.0mm.

Preferably, the abbe number V1 of the first lens satisfies: 60< V1<90; the effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy the following conditions: 7.1mm < f tan (FOV/2) <8.0mm. The abbe number V1 of the first lens satisfies: 62< V1<85.

In the present embodiment, the refractive index N2 of the second lens and the refractive index N3 of the third lens satisfy: 3.1< N2+N3<3.7. The deflection of light rays can be reasonably controlled by restraining the refractive indexes of the second lens and the third lens, so that the optical performance of the optical imaging lens is effectively improved, and the imaging quality of the optical imaging lens is ensured. Preferably 3.13< n2+n3<3.6.

In the present embodiment, the effective focal length f1 of the first lens element, the radius of curvature R1 of the object-side surface of the first lens element, and the radius of curvature R2 of the image-side surface of the first lens element satisfy: 0.8< (R1+R2)/f 1<1.5. By controlling (R1+R2)/f 1 in a reasonable range, the optical imaging lens is convenient to realize deflection of an optical path, and the advanced spherical aberration generated by the optical imaging lens is balanced, so that the imaging quality of the optical imaging lens is ensured. Preferably 0.85< (R1+R2)/f 1<1.4.

In the present embodiment, the effective focal length f4 of the fourth lens, the effective focal length f2 of the second lens, and the effective focal length f6 of the sixth lens satisfy: 0.6< (f2+f4)/f6 <1.6. By restricting the effective focal lengths of the second lens, the fourth lens and the sixth lens, the focal power is reasonably distributed, so that good imaging quality is obtained, and the effect of high resolution is realized. Preferably 0.8< (f2+f4)/f6 <1.5.

In the present embodiment, the effective focal length f3 of the third lens, the effective focal length f5 of the fifth lens, and the effective focal length f7 of the seventh lens satisfy: 0.3< f 3/(f5+f7) <1.6. By restricting the effective focal lengths of the fifth lens and the seventh lens and the effective focal length of the third lens in a certain interval, the focal power can be reasonably distributed, and good imaging quality can be obtained. Preferably 0.4< f 3/(f5+f7) <1.5.

In the present embodiment, the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 4.5< (R3+R4)/(R3-R4) <7.5. By reasonably controlling the curvature radius of the object side surface of the second lens and the curvature radius of the image side surface of the second lens within a certain range, the aberration generated by the optical imaging lens at the second lens can be effectively controlled, and the imaging quality of the optical imaging lens is ensured. Preferably, 4.6< (R3+R4)/(R3-R4) <7.0.

In the present embodiment, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy: 1.1< R6/R5<1.6. By controlling the curvature radius of the object side surface of the third lens and the curvature radius of the image side surface of the third lens within a certain range, the surface shape of the third lens can be reasonably controlled, and the sensitivity of the optical imaging lens can be effectively reduced. Preferably 1.2< R6/R5<1.5.

In the present embodiment, the effective focal length f8 of the eighth lens element, the radius of curvature R15 of the object-side surface of the eighth lens element, and the radius of curvature R16 of the image-side surface of the eighth lens element satisfy: 0.8< (R16-R15)/f 8<5.6. By controlling (R16-R15)/f 8 in a reasonable range, the deflection angle of marginal rays of the optical imaging lens can be reasonably controlled, the optical imaging lens is ensured to have good machinability, and the sensitivity of the optical imaging lens is reduced. Preferably 0.9< (R16-R15)/f 8<5.5.

In the present embodiment, the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis, and the central thickness CT2 of the second lens on the optical axis satisfy: 9.0< f 12/(CT1+CT2) <16.0. By controlling the combined focal length of the first lens and the second lens and the center thicknesses of the first lens and the second lens, the processability can be reasonably ensured, the contribution rate of spherical aberration of the first lens and the second lens is reduced, and the imaging quality of the optical imaging lens is ensured. Preferably, 9.1< f 12/(CT 1+ CT 2) <15.8.

In the present embodiment, the combined focal length f67 of the sixth lens and the seventh lens, the air space T34 on the optical axis of the third lens and the fourth lens, and the air space T78 on the optical axis of the seventh lens and the eighth lens satisfy: 4.0< f 67/(t34+t78) <5.3. By controlling f 67/(t34+t78) within a reasonable range, the requirements of workability of the sixth lens, seventh lens, third lens, and fourth lens are satisfied. Preferably, 4.1< f 67/(t34+t78) <5.2.

In the present embodiment, the edge thickness ET4 of the fourth lens, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 0.8< (ET 4+ ET 5)/ET 6<1.5. The edge thicknesses of the fourth lens, the fifth lens and the sixth lens are reasonably restrained, the phenomenon that the edges of the lenses are too thin and are difficult to mold can be avoided, meanwhile, the light deflection at the edges of the lenses is alleviated, and stronger ghost images are avoided. Preferably, 1.0< (ET 4+ ET 5)/ET 6<1.4.

In the present embodiment, an on-axis distance SAG82 between an intersection point of the image side surface of the eighth lens and the optical axis and an apex of the effective radius of the image side surface of the eighth lens, an on-axis distance SAG81 between an intersection point of the object side surface of the eighth lens and the optical axis and an apex of the effective radius of the object side surface of the eighth lens, an on-axis distance SAG72 between an intersection point of the image side surface of the seventh lens and the optical axis and an apex of the effective radius of the image side surface of the seventh lens, and an on-axis distance SAG71 between an intersection point of the object side surface of the seventh lens and the optical axis and an apex of the effective radius of the object side surface of the seventh lens satisfy: 1.2< (SAG81+SAG82)/(SAG71+SAG72) <1.9. By controlling (SAG81+SAG82)/(SAG71+SAG72) within a reasonable range, the shape and processing of the last two lenses can be ensured to be at a better level, and spherical aberration, coma aberration and astigmatism generated by the optical imaging lens can be balanced. Preferably, 1.3< (SAG81+SAG82)/(SAG71+SAG72) <1.8.

Example two

As shown in fig. 1 to 25, the optical imaging lens includes, in order from an object side of the optical imaging lens to an image side of the optical imaging lens: the lens system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has negative focal power; the seventh lens has positive focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; the eighth lens has negative focal power, and the object side surface of the eighth lens is a convex surface; wherein the abbe number V1 of the first lens satisfies: 60< V1<90; the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 9.0< f 12/(CT1+CT2) <16.0.

The optical power of each lens of the optical imaging lens is reasonably distributed in positive and negative, so that low-order aberration of the optical imaging lens can be effectively balanced, the sensitivity of tolerance of the optical imaging lens can be reduced, the miniaturization of the optical imaging lens is kept, and the imaging quality of the optical imaging lens is ensured. The Abbe number of the first lens is controlled in a reasonable range, so that the dispersion degree of the optical imaging lens can be reasonably controlled, the chromatic aberration correcting capability of the optical imaging lens is improved, and the optical imaging lens can achieve a better imaging effect. The Abbe number of the first lens is controlled to reasonably control the chromatic dispersion degree of the system, improve the chromatic aberration correcting capacity and achieve a better imaging effect. By controlling the combined focal length of the first lens and the second lens and the center thicknesses of the first lens and the second lens, the processability can be reasonably ensured, the contribution rate of spherical aberration of the first lens and the second lens is reduced, and the imaging quality of the optical imaging lens is ensured.

Preferably, the abbe number V1 of the first lens satisfies: 60< V1<90. The combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 9.1< f 12/(CT1+CT2) <15.8.

Optionally, the optical imaging lens may further include a filter for correcting color deviation and/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 eight lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like of each lens, the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the processability 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 and the like. The optical imaging lens also has large aperture and large angle of view. 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 aspherical 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 a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although the description has been made by taking eight lenses as an example in the embodiment, the optical imaging lens is not limited to include eight lenses. The optical imaging lens may also include other numbers of lenses, if desired.

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

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

Example one

As shown in fig. 1 to 5, an optical imaging lens according to an example one 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 sequentially includes, 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, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is convex, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is convex, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 of the sixth lens element is convex, and an image-side surface S12 of the sixth lens element is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 of the seventh lens element is convex, and an image-side surface S14 of the seventh lens element is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 of the eighth lens element is convex, and an image-side surface S16 of the eighth lens element is concave. The filter E9 has an object side S17 of the filter and an image side S18 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.

In this example, the total effective focal length f of the optical imaging lens is 7.55mm, the total length TTL of the optical imaging lens is 9.49mm and the image height ImgH is 7.39mm.

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

TABLE 1

In the first example, the object side surface and the image side surface of any one of the first lens element E1 to the eighth lens element E8 are aspheric, and the surface shape of each aspheric lens element can be defined by, but not limited to, the following aspheric formula:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height 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 aspherical i-th order. The following Table 2 shows the higher order coefficients 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-S16 in example one.

TABLE 2

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

As can be seen from fig. 2 to 5, the optical imaging lens according to the example one 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, a description of portions similar to those of example one will be omitted for the sake of brevity. Fig. 6 is a schematic diagram showing the structure of an optical imaging lens of example two.

As shown in fig. 6, the optical imaging lens sequentially includes, 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, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is convex, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is convex, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, and an object-side surface S11 and an image-side surface S12 of the sixth lens element are concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 of the seventh lens element is convex, and an image-side surface S14 of the seventh lens element is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 of the eighth lens element is convex, and an image-side surface S16 of the eighth lens element is concave. The filter E9 has an object side S17 of the filter and an image side S18 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.

In this example, the total effective focal length f of the optical imaging lens is 7.57mm, the total length TTL of the optical imaging lens is 9.49mm and the image height ImgH is 7.39mm.

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

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TABLE 3 Table 3

Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example two, where each of the aspherical surface types can be defined by equation (1) given in example one above.

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TABLE 4 Table 4

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

As can be seen from fig. 7 to fig. 10, the optical imaging lens provided in example two can achieve good imaging quality.

Example three

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 sequentially includes, from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the stop STO, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is concave, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 of the sixth lens element is convex, and an image-side surface S12 of the sixth lens element is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 of the seventh lens element is convex, and an image-side surface S14 of the seventh lens element is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 of the eighth lens element is convex, and an image-side surface S16 of the eighth lens element is concave. The filter E9 has an object side S17 of the filter and an image side S18 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.

In this example, the total effective focal length f of the optical imaging lens is 7.55mm, the total length TTL of the optical imaging lens is 9.50mm and the image height ImgH is 7.40mm.

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

TABLE 5

Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example three, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

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TABLE 6

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

As can be seen from fig. 12 to 15, the optical imaging lens given in example three 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 sequentially includes, 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, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is convex, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 of the sixth lens element is convex, and an image-side surface S12 of the sixth lens element is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 of the seventh lens element is convex, and an image-side surface S14 of the seventh lens element is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 of the eighth lens element is convex, and an image-side surface S16 of the eighth lens element is concave. The filter E9 has an object side S17 of the filter and an image side S18 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.

In this example, the total effective focal length f of the optical imaging lens is 7.55mm, the total length TTL of the optical imaging lens is 9.50mm and the image height ImgH is 7.39mm.

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

TABLE 7

Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example four, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

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TABLE 8

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

As can be seen from fig. 17 to 20, the optical imaging lens provided in 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 sequentially includes, from an object side to an image side: the first lens E1, the second lens E2, the third lens E3, the stop STO, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the filter E9, and the imaging plane S19.

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

TABLE 9

Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example five, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-7.6353E-04

3.9972E-03

-9.6628E-03

1.4498E-02

-1.4396E-02

9.8345E-03

-4.7442E-03

S2

-5.0792E-03

-1.1876E-03

9.4016E-03

-2.0954E-02

2.7331E-02

-2.3740E-02

1.4463E-02

S3

-9.4244E-03

2.1573E-03

8.2820E-03

-2.4775E-02

3.7447E-02

-3.6507E-02

2.4636E-02

S4

-8.2405E-03

-9.0510E-04

1.7377E-02

-4.5094E-02

6.8602E-02

-6.9622E-02

4.9454E-02

S5

-1.1000E-02

1.9881E-04

1.2657E-03

-9.5935E-03

2.2376E-02

-3.0930E-02

2.8331E-02

S6

-5.5698E-03

-6.4536E-03

2.4763E-02

-6.5658E-02

1.1186E-01

-1.3034E-01

1.0733E-01

S7

-2.7412E-02

1.5930E-02

-4.3720E-02

8.0546E-02

-1.0516E-01

9.9086E-02

-6.8518E-02

S8

-1.9151E-02

2.8718E-02

-7.8239E-02

1.0588E-01

-9.3412E-02

5.8823E-02

-2.7332E-02

S9

7.7752E-03

1.4898E-02

-5.8470E-02

7.4126E-02

-5.6593E-02

3.0044E-02

-1.1675E-02

S10

5.9595E-03

-6.1062E-03

-1.4104E-03

4.0543E-03

-3.6005E-03

2.1621E-03

-9.4350E-04

S11

6.6498E-03

-9.5194E-03

9.0118E-03

-7.1051E-03

4.0588E-03

-1.6987E-03

5.2585E-04

S12

-3.2656E-02

2.6333E-04

7.0177E-03

-4.9545E-03

2.0651E-03

-6.0348E-04

1.2941E-04

S13

-1.0787E-02

-4.8370E-03

2.5542E-03

-1.1676E-03

3.7246E-04

-8.1355E-05

1.2404E-05

S14

2.9701E-02

-1.2434E-02

1.6524E-03

3.9183E-05

-5.9058E-05

1.2374E-05

-1.5213E-06

S15

-5.9738E-02

1.1533E-02

-1.8007E-03

3.1129E-04

-4.7417E-05

5.3446E-06

-4.3174E-07

S16

-6.7001E-02

1.6613E-02

-3.7089E-03

6.7188E-04

-9.1609E-05

9.1484E-06

-6.6585E-07

Face number

A18

A20

A22

A24

A26

A28

A30

S1

1.6388E-03

-4.0652E-04

7.1752E-05

-8.7867E-06

7.0913E-07

-3.3905E-08

7.2740E-10

S2

-6.3162E-03

1.9872E-03

-4.4637E-04

6.9761E-05

-7.2005E-06

4.4084E-07

-1.2113E-08

S3

-1.1818E-02

4.0584E-03

-9.8984E-04

1.6729E-04

-1.8610E-05

1.2248E-06

-3.6100E-08

S4

-2.5098E-02

9.1467E-03

-2.3734E-03

4.2758E-04

-5.0782E-05

3.5717E-06

-1.1256E-07

S5

-1.7900E-02

7.9283E-03

-2.4581E-03

5.2278E-04

-7.2681E-05

5.9512E-06

-2.1767E-07

S6

-6.3486E-02

2.7089E-02

-8.2673E-03

1.7603E-03

-2.4839E-04

2.0876E-05

-7.9106E-07

S7

3.4914E-02

-1.3032E-02

3.5072E-03

-6.6037E-04

8.2359E-05

-6.1009E-06

2.0295E-07

S8

9.4534E-03

-2.4221E-03

4.5235E-04

-5.9722E-05

5.2717E-06

-2.7870E-07

6.6637E-09

S9

3.3753E-03

-7.2471E-04

1.1383E-04

-1.2686E-05

9.4881E-07

-4.2654E-08

8.7029E-10

S10

3.0141E-04

-7.0080E-05

1.1677E-05

-1.3537E-06

1.0339E-07

-4.6653E-09

9.4000E-11

S11

-1.2060E-04

2.0354E-05

-2.4860E-06

2.1306E-07

-1.2119E-08

4.0990E-10

-6.2277E-12

S12

-2.0605E-05

2.4269E-06

-2.0787E-07

1.2532E-08

-5.0194E-10

1.1953E-11

-1.2776E-13

S13

-1.3431E-06

1.0419E-07

-5.7635E-09

2.2222E-10

-5.6755E-12

8.6259E-14

-5.9020E-16

S14

1.2682E-07

-7.4532E-09

3.0971E-10

-8.9098E-12

1.6881E-13

-1.8953E-15

9.5581E-18

S15

2.5123E-08

-1.0570E-09

3.1920E-11

-6.7527E-13

9.5075E-15

-8.0045E-17

3.0490E-19

S16

3.5316E-08

-1.3597E-09

3.7528E-11

-7.2267E-13

9.2131E-15

-6.9846E-17

2.3831E-19

Table 10

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

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

In summary, examples one to five satisfy the relationships shown in table 11, respectively.

Condition/example	1	2	3	4	5
						V1	64.05	81.61	68.30	67.70	65.70
f*tan(FOV/2)(mm)	7.19	7.19	7.21	7.23	7.23
						N2+N3	3.23	3.18	3.21	3.50	3.21
(R1+R2)/f1	1.35	1.17	1.29	1.07	1.28
						(f2+f4)/f6	0.85	1.46	1.06	0.92	1.08
f3/(f5+f7)	1.07	1.36	1.30	0.67	1.27
						(R3+R4)/(R3-R4)	4.72	6.94	6.78	4.97	6.40
R6/R5	1.31	1.28	1.23	1.31	1.25
						(R16-R15)/f8	2.64	5.49	1.31	1.05	1.25
f12/(CT1+CT2)	10.07	9.31	10.55	14.44	10.66
						f67/(T34+T78)	5.03	5.12	4.45	4.25	4.41
(ET4+ET5)/ET6	1.09	1.16	1.20	1.28	1.24
						(SAG81+SAG82)/(SAG71+SAG72)	1.67	1.74	1.56	1.41	1.66

TABLE 11

Table 12 gives the effective focal lengths f of the optical imaging lenses of examples one to five, the effective focal lengths f1 to f8 of the respective lenses.

Example parameters	1	2	3	4	5
						f1(mm)	9.39	10.06	9.76	11.11	9.72
f2(mm)	-23.63	-36.29	-34.11	-25.97	-32.73
						f3(mm)	33.15	39.45	42.74	21.04	40.69
f4(mm)	-23.98	-22.10	-23.62	-22.52	-22.27
						f5(mm)	21.60	20.16	24.71	23.63	24.21
f6(mm)	-56.19	-39.90	-54.27	-52.69	-51.06
						f7(mm)	9.31	8.86	8.11	8.01	7.94
f8(mm)	-6.68	-6.65	-6.71	-6.84	-6.75
						f(mm)	7.55	7.57	7.55	7.55	7.55
TTL(mm)	9.49	9.49	9.50	9.50	9.50
						ImgH(mm)	7.39	7.39	7.40	7.39	7.40

Table 12

The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

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 also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated 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 the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An optical imaging lens, characterized by comprising, in order from an object side of the optical imaging lens to an image side of the optical imaging lens:

the lens comprises a first lens, a second lens and a third lens, wherein the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;

a second lens having negative optical power;

a third lens having positive optical power;

A fourth lens having negative optical power;

a fifth lens having positive optical power;

a sixth lens having negative optical power;

a seventh lens having positive optical power, wherein an object side surface of the seventh lens is a convex surface, and an image side surface of the seventh lens is a concave surface;

an eighth lens having negative optical power, the object side surface of the eighth lens being a convex surface;

wherein the abbe number V1 of the first lens satisfies: 60< V1<90;

the combined focal length f12 of the first lens and the second lens, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 9.0< f 12/(CT1+CT2) <16.0.

2. The optical imaging lens of claim 1, wherein a refractive index N2 of the second lens and a refractive index N3 of the third lens satisfy: 3.1< N2+N3<3.7.

3. The optical imaging lens of claim 1, wherein an effective focal length f1 of the first lens, a radius of curvature R1 of an object side surface of the first lens, and a radius of curvature R2 of an image side surface of the first lens satisfy: 0.8< (R1+R2)/f 1<1.5.

4. The optical imaging lens of claim 1, wherein an effective focal length f4 of the fourth lens, an effective focal length f2 of the second lens, and an effective focal length f6 of the sixth lens satisfy: 0.6< (f2+f4)/f6 <1.6.

5. The optical imaging lens of claim 1, wherein an effective focal length f3 of the third lens, an effective focal length f5 of the fifth lens, and an effective focal length f7 of the seventh lens satisfy: 0.3< f 3/(f5+f7) <1.6.

6. The optical imaging lens of claim 1, wherein a radius of curvature R3 of an object side surface of the second lens and a radius of curvature R4 of an image side surface of the second lens satisfy: 4.5< (R3+R4)/(R3-R4) <7.5.

7. The optical imaging lens of claim 1, wherein a radius of curvature R5 of an object side surface of the third lens and a radius of curvature R6 of an image side surface of the third lens satisfy: 1.1< R6/R5<1.6.

8. The optical imaging lens of claim 1, wherein an effective focal length f8 of the eighth lens, a radius of curvature R15 of an object-side surface of the eighth lens, and a radius of curvature R16 of an image-side surface of the eighth lens satisfy: 0.8< (R16-R15)/f 8<5.6.

9. The optical imaging lens according to claim 1, wherein a combined focal length f67 of the sixth lens and the seventh lens, an air space T34 of the third lens and the fourth lens on an optical axis, and an air space T78 of the seventh lens and the eighth lens on the optical axis satisfy: 4.0< f 67/(t34+t78) <5.3.

10. The optical imaging lens of claim 1, wherein between an edge thickness ET4 of the fourth lens, an edge thickness ET5 of the fifth lens, and an edge thickness ET6 of the sixth lens: 0.8< (ET 4+ ET 5)/ET 6<1.5.