CN113759523B

CN113759523B - Optical imaging lens

Info

Publication number: CN113759523B
Application number: CN202111213702.4A
Authority: CN
Inventors: 陈超; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2024-01-12
Anticipated expiration: 2041-10-19
Also published as: CN113759523A

Abstract

The application provides an optical imaging lens, including in order from the object side to the image side along the optical axis: the first lens group with positive focal power comprises a first lens and a second lens, wherein the first lens is made of glass, and both an object side surface and an image side surface are aspheric surfaces; a second lens group having positive optical power, including a third lens, a fourth lens and a fifth lens, wherein an image-side surface of the fifth lens is a concave surface; a third lens group having optical power, including a sixth lens; a fourth lens group having negative optical power, including a seventh lens, an eighth lens having positive optical power, and a ninth lens having negative optical power; wherein, aperture value FNo of the optical imaging lens satisfies: fno <1.5.

Description

Optical imaging lens

Technical Field

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

Background

In recent years, various portable electronic products such as smartphones and the like have been rapidly developed, and there is a higher demand for an optical imaging lens mounted on the portable electronic products. In order to have good optical performance, the existing miniaturized imaging lens often has a larger f-number Fno, that is, the ratio of the total effective focal length of the lens to the entrance pupil diameter of the lens is larger.

However, the existing optical imaging lens, for example, the f-number Fno is 2.0 or more than 2.0, cannot meet the higher imaging requirement under the condition of insufficient light, and the existing six-piece or seven-piece lens structure is insufficient to effectively cope with the challenge of a large aperture. Therefore, under the condition of ensuring structural manufacturability, how to enable the optical imaging lens to achieve high imaging quality under the condition of limited illumination is one of the problems to be solved in the field.

Disclosure of Invention

The application provides an optical imaging lens, can include in order from the object side to the image side along the optical axis: the first lens group with positive focal power comprises a first lens and a second lens, wherein the first lens is made of glass, and both an object side surface and an image side surface are aspheric surfaces; a second lens group having positive optical power, including a third lens, a fourth lens and a fifth lens, wherein an image-side surface of the fifth lens is a concave surface; a third lens group having optical power, including a sixth lens; a fourth lens group having negative optical power, including a seventh lens, an eighth lens having positive optical power, and a ninth lens having negative optical power; wherein, aperture value FNo of the optical imaging lens satisfies FNo <1.5.

In some embodiments, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f9 of the ninth lens may satisfy: -1.5< f 9/|f1+f2| < 0.5.

In some implementations, the effective focal length FG1 of the first lens group and the effective focal length FG2 of the second lens group may satisfy: 0.2< FG1/FG2<1.1.

In some embodiments, 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 may satisfy: 0.5< f 8/(R15+R16) <1.

In some embodiments, the total effective focal length f of the optical imaging lens and the effective focal length FG4 of the fourth lens group may satisfy: -0.5< f/FG4<0.

In some embodiments, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens may satisfy: imgH >8mm.

In some embodiments, the optical imaging lens further includes a diaphragm, and a distance SL between the diaphragm and an imaging surface of the optical imaging lens along an optical axis and a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens along the optical axis may satisfy: 0.5< SL/TTL <1.

In some embodiments, the separation distance T12 of the first lens and the second lens along the optical axis, the separation distance T34 of the third lens and the fourth lens along the optical axis, the separation distance T45 of the fourth lens and the fifth lens along the optical axis, and the separation distance T78 of the seventh lens and the eighth lens along the optical axis may satisfy: 0.8< (T12+T34)/(T45+T78) <1.

In some embodiments, the effective half-caliber DT92 of the image side surface of the ninth lens, the effective half-caliber DT11 of the object side surface of the first lens, and the effective half-caliber DT12 of the image side surface of the first lens may satisfy: 0.9< DT92/(DT 11+DT 12) <1.1.

In some embodiments, the optical imaging lens further includes a diaphragm, and the effective half-aperture DT52 of the image side surface of the fifth lens, the effective half-aperture DT51 of the object side surface of the fifth lens, and the distance SD between the diaphragm and the image side surface of the ninth lens along the optical axis may satisfy: 1< sd/(dt51+dt52) <1.3.

In some embodiments, the central thickness CT1 of the first lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, and the separation distance T23 of the second lens and the third lens along the optical axis may satisfy: 0< (CT 1-CT 4)/T23 <0.5.

In some embodiments, the abbe number V1 of the first lens may satisfy: 40< V1<50.

In some embodiments, the center thickness CT9 of the ninth lens on the optical axis and the edge thickness ET9 of the ninth lens may satisfy: 0.6< ET9/CT9<1.6.

In some embodiments, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens may satisfy: 1.9< ET6/ET5<3.

In some embodiments, a maximum value Nmax of refractive indices of the first to ninth lenses may satisfy: nmax >1.7.

In some embodiments, the material of at least three lenses of the first to ninth lenses may be plastic.

In some embodiments, each adjacent lens of the first to ninth lenses has an air gap therebetween.

The application further provides an optical imaging lens, which sequentially comprises from an object side to an image side along an optical axis: the first lens group with positive focal power comprises a first lens and a second lens, wherein the first lens is made of glass, and both an object side surface and an image side surface are aspheric surfaces; a second lens group having positive optical power, including a third lens, a fourth lens and a fifth lens, wherein an image-side surface of the fifth lens is a concave surface; a third lens group having optical power, including a sixth lens; a fourth lens group having negative optical power, including a seventh lens, an eighth lens having positive optical power, and a ninth lens having negative optical power; wherein an effective focal length FG1 of the first lens group and an effective focal length FG2 of the second lens group may satisfy: 0.2< FG1/FG2<1.1.

The application adopts four lens groups, including nine lens architectures, through the focal power of each lens group of rational distribution and each lens, face, the central thickness of each lens and epaxial interval etc. between each lens for above-mentioned optical imaging lens realizes at least one beneficial effect such as great light ring, high imaging quality when satisfying the imaging requirement.

Drawings

Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;

fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;

Fig. 3 shows a schematic structural view of an optical imaging lens according to embodiment 2 of the present application;

fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;

fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;

fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3;

fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 4;

fig. 9 shows a schematic structural view of an optical imaging lens according to embodiment 5 of the present application;

fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 5;

fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application;

fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 6;

Fig. 13 shows a schematic structural view of an optical imaging lens according to embodiment 7 of the present application;

fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 7;

fig. 15 shows a schematic structural view of an optical imaging lens according to embodiment 8 of the present application; and

fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 8.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

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. In particular, 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 closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.

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

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

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

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

The optical imaging lens according to an exemplary embodiment of the present application may include, for example, four lens groups, i.e., a first lens group including a first lens and a second lens group including a third lens, a fourth lens, and a fifth lens, a third lens group including a sixth lens, and a fourth lens group including a seventh lens, an eighth lens, and a ninth lens. The nine lenses are arranged in order from the object side to the image side along the optical axis. In the first lens to the ninth lens, any adjacent two lenses may have an air space therebetween.

In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The diaphragm may be provided at an appropriate position as required, for example, between the second lens and the third lens.

In an exemplary embodiment, the first lens group may have positive optical power, include a first lens and a second lens, the material of the first lens may be glass, and both the object side surface and the image side surface may be aspherical; the second lens group can have positive focal power and comprises a third lens, a fourth lens and a fifth lens, and the image side surface of the fifth lens can be a concave surface; the third lens group may have positive or negative power, including a sixth lens; the fourth lens group may have negative optical power, including a seventh lens, an eighth lens, and a ninth lens, the eighth lens may have positive optical power, and the ninth lens may have negative optical power. The positive and negative focal power of each lens group of the optical imaging lens can be reasonably distributed, so that the effect of long-range shooting can be effectively improved. In addition, the first lens group has positive focal power, the object side surface and the image side surface of the first lens are aspheric, and the good processability of the first lens can be ensured by reasonably matching the focal power and the surface shape of the first lens.

In an exemplary embodiment, the image side surface of the fifth lens may be concave. By reasonably configuring the shape of the fifth lens, the smaller incidence angle of the principal ray of the optical imaging lens when entering the image plane of the fifth lens can be ensured to a certain extent, and the miniaturization of the optical imaging lens is facilitated.

In an exemplary embodiment, the optical imaging lens may satisfy Fno <1.5, where Fno is an aperture value of the optical imaging lens. The optical imaging lens satisfies Fno <1.5, so that the optical imaging lens can have high relative illuminance under the condition of insufficient light, and satisfies higher imaging requirements. More specifically, fno may further satisfy: 1< fno <1.5.

In an exemplary embodiment, the optical imaging lens may satisfy-1.5 < f 9/|f1+f2| < -0.5, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f9 is the effective focal length of the ninth lens. The optical imaging lens meets-1.5 < f 9/|f1+f2| < -0.5, is beneficial to effectively reducing the optical sensitivity of the ninth lens and is more beneficial to realizing mass production. More specifically, f1, f2, and f9 further satisfy: -1.2< f 9/|f1+f2| < 0.8.

In an exemplary embodiment, the optical imaging lens may satisfy 0.2< fg1/FG2<1.1, where FG1 is an effective focal length of the first lens group and FG2 is an effective focal length of the second lens group. The optical imaging lens meets the requirement of 0.2 FG1/FG2<1.1, so that the first lens group and the second lens group of the optical imaging lens can be balanced with aberration generated by the lens group at the rear end, good imaging quality is further obtained, and the effect of high resolution of the optical imaging lens is realized. More specifically, FG1 and FG2 may satisfy: 0.5< FG1/FG2<1.

In an exemplary embodiment, the optical imaging lens may further satisfy 0.5< f 8/(r15+r16) <1, where f8 is an effective focal length of the eighth lens, R15 is a radius of curvature of an object side surface of the eighth lens, and R16 is a radius of curvature of an image side surface of the eighth lens. The optical imaging lens satisfies 0.5< f 8/(R15+R16) <1, which is beneficial to controlling the incidence angle of off-axis vision field light on the imaging surface of the optical lens and increasing the matching performance with the photosensitive element and the band-pass filter. More specifically, f8, R15, and R16 may further satisfy: 0.7< f 8/(R15+R16) <0.9.

In an exemplary embodiment, the optical imaging lens may satisfy-0.5 < f/FG4<0, where f is the total effective focal length of the optical imaging lens and FG4 is the effective focal length of the fourth lens group. The optical imaging lens meets-0.5 < f/FG4<0, which is favorable for better balancing aberration of the optical imaging lens and improving the resolution of the optical imaging lens.

In an exemplary embodiment, the optical imaging lens may satisfy ImgH >8mm, where ImgH is half the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens. The optical imaging lens meets the requirement that ImgH is more than 8mm, the resolution ratio of the optical imaging lens is improved, and good imaging quality is obtained. More specifically, imgH may further satisfy: 8mm < ImgH <8.5mm.

In an exemplary embodiment, the optical imaging lens may satisfy 0.5< SL/TTL <1, where the optical imaging lens further includes a stop, SL is a distance along the optical axis from the stop to an imaging surface of the optical imaging lens, and TTL is a distance along the optical axis from an object side surface of the first lens to the imaging surface of the optical imaging lens. The optical imaging lens satisfies 0.5< SL/TTL <1, is favorable for reducing the length of the optical imaging lens and ensures the ultrathin effect of the lens. More specifically, SL and TTL may further satisfy 0.7< SL/TTL <0.8.

In an exemplary embodiment, the optical imaging lens may satisfy 0.8< (t12+t34)/(t45+t78) <1, where T12 is a distance between the first lens and the second lens along the optical axis, T34 is a distance between the third lens and the fourth lens along the optical axis, T45 is a distance between the fourth lens and the fifth lens along the optical axis, and T78 is a distance between the seventh lens and the eighth lens along the optical axis. The optical imaging lens meets the requirement of 0.8< (T12+T34)/(T45+T78) <1, which is beneficial to improving the stability of lens assembly and the consistency of mass production, and further improves the yield of the optical imaging lens.

In an exemplary embodiment, the optical imaging lens may satisfy 0.9< dt92/(dt11+dt12) <1.1, where DT92 is the effective half-caliber of the image side of the ninth lens, DT11 is the effective half-caliber of the object side of the first lens, and DT12 is the effective half-caliber of the image side of the first lens. The optical imaging lens meets 0.9< DT92/(DT 11+ DT 12) <1.1, is favorable for effectively reducing the size of the optical imaging lens, meets the requirement of miniaturization of the optical imaging lens, and improves the resolution. More specifically, DT92, DT11, and DT12 may further satisfy 0.95< dt92/(dt11+dt12) <1.05.

In an exemplary embodiment, the optical imaging lens may satisfy 1< SD/(dt51+dt52) <1.3, wherein the optical imaging lens further includes a diaphragm, SD is a distance along the optical axis from the diaphragm to the image side of the ninth lens, DT51 is an effective half-caliber of the object side of the fifth lens, and DT52 is an effective half-caliber of the image side of the fifth lens. The optical imaging lens satisfies 1< SD/(DT 51+DT 52) <1.3, can effectively reduce the assembly difficulty of the optical imaging lens, and ensures that the aberration of the optical imaging lens is smaller. More specifically, SD, DT51, and DT52 may further satisfy 1.1< SD/(dt51+dt52) <1.2.

In an exemplary embodiment, the optical imaging lens may satisfy 0< (CT 1-CT 4)/T23 <0.5, where CT1 is a center thickness of the first lens on the optical axis, CT4 is a center thickness of the fourth lens on the optical axis, and T23 is a separation distance of the second lens and the third lens along the optical axis. The optical imaging lens satisfies 0< (CT 1-CT 4)/T23 <0.5, and is favorable for improving the capability of the optical imaging lens for correcting field curvature and astigmatism. More specifically, CT1, CT4, and T23 may further satisfy 0.1< (CT 1-CT 4)/T23 <0.4.

In an exemplary embodiment, the optical imaging lens may satisfy 40< V1<50, where V1 is an abbe number of the first lens. The optical imaging lens meets the requirement of 40< V1<50, and is beneficial to improving the chromatic aberration correction capability of the optical imaging lens. More specifically, V1 may further satisfy 43< V1<47.

In an exemplary embodiment, the optical imaging lens may satisfy 0.6< ET9/CT9<1.6, where ET9 is an edge thickness of the ninth lens and CT9 is a center thickness of the ninth lens on the optical axis. The optical imaging lens satisfies 0.6< ET9/CT9<1.6, is favorable for reducing the processing difficulty of the optical lens, reduces the angle between the main light ray and the optical axis when the main light ray is incident on the image plane, and improves the relative illuminance of the image plane.

In an exemplary embodiment, the optical imaging lens may satisfy 1.9< ET6/ET5<3, where ET6 is an edge thickness of the sixth lens and ET5 is an edge thickness of the fifth lens. The optical imaging lens meets 1.9< ET6/ET5<3, is beneficial to improving the processability of the optical imaging lens, and ensures better imaging quality.

In an exemplary embodiment, the optical imaging lens may satisfy Nmax >1.7, where Nmax is the maximum value of refractive indexes of the first lens to the ninth lens. The optical imaging lens meets Nmax >1.7, which is favorable for the optical imaging lens to correct aberration better and improve resolution.

In an exemplary embodiment, at least three lenses of the first lens to the ninth lens may be made of plastic, which is favorable for making the optical imaging lens easy to process, realizing the light and thin characteristics of the optical imaging lens, and has low manufacturing cost and can save production cost.

In an exemplary embodiment, the first lens to the ninth lens have an air gap between each adjacent lens, which is beneficial to enabling the optical imaging lens to have a high enough degree of freedom and improving the correction capability of the optical imaging lens for aberration.

In an exemplary embodiment, 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 according to the above-described embodiments of the present application may employ a plurality of lens groups, each of which may include a plurality of optical lenses, for example, four lens groups including nine optical lenses as described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens, the volume of the optical imaging lens can be effectively reduced, the sensitivity of the optical imaging lens can be reduced, and the processability of the optical imaging lens can be improved, so that the optical imaging lens is more beneficial to production and processing and is applicable to portable electronic products. The optical imaging lens provided by the embodiment of the application has the characteristics of meeting imaging requirements, achieving a large aperture and achieving high imaging quality.

In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the ninth lens is an aspherical mirror. 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. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first, second, third, fourth, fifth, sixth and seventh, eighth and ninth lenses are aspherical mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens may be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although four lens groups including nine lenses are described as an example in the embodiment, the optical imaging lens is not limited to four lens groups including nine lenses. The optical imaging lens may also include other numbers of lenses, if desired.

Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, and has a concave object-side surface S17 and a concave image-side surface S18. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

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

TABLE 1

In embodiment 1, the total effective focal length f of the optical imaging lens is 8.32mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.4 °, and the aperture value Fno of the optical imaging lens is 1.3.

In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the ninth lens E9 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical 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. Table 2 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1 to S18 in example 1 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ 、A ₂₈ And A ₃₀ 。

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, and has a concave object-side surface S17 and a concave image-side surface S18. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In embodiment 2, the total effective focal length f of the optical imaging lens is 8.30mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.5 °, and the aperture value Fno of the optical imaging lens is 1.3.

Table 3 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.

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TABLE 3 Table 3

TABLE 4 Table 4

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, and has a concave object-side surface S17 and a concave image-side surface S18. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In embodiment 3, the total effective focal length f of the optical imaging lens is 8.33mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.4 °, and the aperture value Fno of the optical imaging lens is 1.3.

Table 5 shows the basic parameter table of the optical imaging lens of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.

TABLE 5

TABLE 6

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, and has a concave object-side surface S17 and a concave image-side surface S18. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In embodiment 4, the total effective focal length f of the optical imaging lens is 8.32mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.4 °, and the aperture value Fno of the optical imaging lens is 1.3.

Table 7 shows a basic parameter table of the optical imaging lens of example 4, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.

TABLE 7

TABLE 8

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, and has a concave object-side surface S17 and a concave image-side surface S18. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In embodiment 5, the total effective focal length f of the optical imaging lens is 8.32mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.4 °, and the aperture value Fno of the optical imaging lens is 1.3.

Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.

TABLE 9

Table 10

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.

Example 6

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural diagram of an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 11, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, and has a concave object-side surface S17 and a concave image-side surface S18. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In embodiment 6, the total effective focal length f of the optical imaging lens is 8.34mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.3 °, and the aperture value Fno of the optical imaging lens is 1.3.

Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.

TABLE 11

Table 12

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic structural diagram of an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, and has a concave object-side surface S17 and a concave image-side surface S18. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In embodiment 7, the total effective focal length f of the optical imaging lens is 8.32mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.4 °, and the aperture value Fno of the optical imaging lens is 1.3.

Table 13 shows a basic parameter table of the optical imaging lens of embodiment 7, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.

TABLE 13

TABLE 14

Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve of the optical imaging lens of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens provided in embodiment 7 can achieve good imaging quality.

Example 8

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.

As shown in fig. 15, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a filter E10.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The eighth lens element E8 has positive refractive power, and its object-side surface S15 is convex and its image-side surface S16 is concave. The ninth lens element E9 has negative refractive power, wherein an object-side surface S17 thereof is concave and an image-side surface S18 thereof is convex. The filter E10 has an object side surface S19 and an image side surface S20. The optical imaging lens has an imaging surface S21, and light from an object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.

In embodiment 8, the total effective focal length f of the optical imaging lens is 8.34mm, the distance TTL from the object side surface of the first lens to the imaging surface along the optical axis is 11.20mm, the half of the diagonal length ImgH of the effective pixel region on the imaging surface is 8.11mm, the maximum field angle FOV of the optical imaging lens is 87.2 °, and the aperture value Fno of the optical imaging lens is 1.3.

Table 15 shows a basic parameter table of the optical imaging lens of example 8, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.

TABLE 15

Table 16

Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve of the optical imaging lens of embodiment 8, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens provided in embodiment 8 can achieve good imaging quality.

In summary, examples 1 to 8 each satisfy the relationship shown in table 17.

Condition/example	1	2	3	4	5	6	7	8
									FG1/FG2	0.82	0.91	0.75	0.59	0.73	0.66	0.68	0.74
f/FG4	-0.18	-0.17	-0.11	-0.17	-0.35	-0.16	-0.08	-0.15
									f8/(R15+R16)	0.74	0.77	0.77	0.86	0.78	0.77	0.82	0.77
f9/∣f1+f2∣	-0.90	-1.19	-0.93	-0.97	-0.84	-1.03	-1.04	-1.00
									SL/TTL	0.77	0.77	0.77	0.77	0.77	0.77	0.77	0.77
SD/(DT51+DT52)	1.16	1.15	1.15	1.16	1.15	1.19	1.17	1.17
									ET9/CT9	0.83	0.90	0.92	1.29	0.74	1.35	1.22	1.51
ET6/ET5	2.23	2.53	2.92	2.32	1.99	2.19	2.60	2.61
									(CT1-CT4)/T23	0.27	0.33	0.23	0.15	0.25	0.23	0.20	0.26
DT92/(DT11+DT12)	1.01	1.03	1.00	1.01	1.02	1.01	1.02	0.99
									(T12+T34)/(T45+T78)	0.96	0.99	0.91	0.82	0.94	0.92	0.85	0.98

TABLE 17

The present application also provides an imaging device, the electron-sensitive element of which may 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 may be 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.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It should be understood by those skilled in the art that the scope of protection referred to in this application is not limited to the specific combination of the above technical features, but also encompasses other technical solutions formed by any combination of the above technical features or their equivalents without departing from the spirit of the application. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. The optical imaging lens is characterized by sequentially comprising, from an object side to an image side along an optical axis:

The first lens group with positive focal power comprises a first lens and a second lens, wherein the first lens has positive focal power, the second lens has negative focal power, the material of the first lens is glass, and both the object side surface and the image side surface are aspheric surfaces;

a second lens group having positive optical power, including a third lens, a fourth lens having positive optical power, and a fifth lens having a concave image-side surface;

a third lens group having optical power, including a sixth lens;

a fourth lens group having negative optical power, including a seventh lens having negative optical power, an eighth lens having positive optical power, and a ninth lens having negative optical power;

wherein the number of lenses of the optical imaging lens with optical power is nine,

at most one of the fifth lens and the sixth lens has positive optical power,

the aperture value FNo of the optical imaging lens meets the following conditions: the f no is <1.5,

the center thickness CT1 of the first lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the distance T23 between the second lens and the third lens along the optical axis satisfy: 0< (CT 1-CT 4)/T23 <0.5, and

The effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f9 of the ninth lens satisfy: -1.5< f 9/|f1+f2| < 0.5.

2. The optical imaging lens of claim 1, wherein an effective focal length FG1 of the first lens group and an effective focal length FG2 of the second lens group satisfy:

0.2<FG1/FG2<1.1。

3. 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:

0.5<f8/(R15+R16)<1。

4. the optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and an effective focal length FG4 of the fourth lens group satisfy:

-0.5<f/FG4<0。

5. the optical imaging lens of claim 1, wherein half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens satisfies:

ImgH>8 mm。

6. the optical imaging lens of claim 1, further comprising a stop, a distance SL along an optical axis from the stop to an imaging surface of the optical imaging lens and a distance TTL along the optical axis from an object side surface of the first lens to the imaging surface of the optical imaging lens satisfying:

0.5<SL/TTL<1。

7. The optical imaging lens according to claim 1, wherein a separation distance T12 of the first lens and the second lens along the optical axis, a separation distance T34 of the third lens and the fourth lens along the optical axis, a separation distance T45 of the fourth lens and the fifth lens along the optical axis, and a separation distance T78 of the seventh lens and the eighth lens along the optical axis satisfy:

0.8<(T12+T34)/(T45+T78)<1。

8. the optical imaging lens of claim 1, wherein an effective half-caliber DT92 of an image side surface of the ninth lens, an effective half-caliber DT11 of an object side surface of the first lens, and an effective half-caliber DT12 of an image side surface of the first lens satisfy:

0.9<DT92/(DT11+DT12)<1.1。

9. the optical imaging lens of claim 1, further comprising a diaphragm, wherein an effective half-caliber DT52 of an image side surface of the fifth lens, an effective half-caliber DT51 of an object side surface of the fifth lens, and a distance SD along an optical axis from the diaphragm to the image side surface of the ninth lens satisfy:

1<SD/(DT51+DT52)<1.3。

10. the optical imaging lens of claim 1, wherein the abbe number V1 of the first lens satisfies:

40<V1<50。

11. The optical imaging lens according to claim 1, wherein a center thickness CT9 of the ninth lens on the optical axis and an edge thickness ET9 of the ninth lens satisfy:

0.6<ET9/CT9<1.6。

12. the optical imaging lens of claim 1, wherein an edge thickness ET6 of the sixth lens and an edge thickness ET5 of the fifth lens satisfy:

1.9<ET6/ET5<3。

13. the optical imaging lens according to claim 1, wherein a maximum value Nmax among refractive indices of the first lens to the ninth lens satisfies:

Nmax>1.7。

14. the optical imaging lens as claimed in claim 1, wherein at least three of the first to ninth lenses are made of plastic.

15. The optical imaging lens of claim 1, wherein each of the first to ninth lenses has an air gap between adjacent lenses.

16. The optical imaging lens is characterized by sequentially comprising, from an object side to an image side along an optical axis:

a third lens group having optical power, including a sixth lens;

at most one of the fifth lens and the sixth lens has positive optical power,

an effective focal length FG1 of the first lens group and an effective focal length FG2 of the second lens group satisfy: 0.2< FG1/FG2<1.1,

17. The optical imaging lens of claim 16, 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:

0.5<f8/(R15+R16)<1。

18. the optical imaging lens of claim 16, wherein a total effective focal length f of the optical imaging lens and an effective focal length FG4 of the fourth lens group satisfy:

-0.5<f/FG4<0。

19. the optical imaging lens of claim 16, wherein half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens satisfies:

ImgH>8 mm。

20. the optical imaging lens of claim 16, further comprising a stop, a distance SL along an optical axis from the stop to an imaging surface of the optical imaging lens and a distance TTL along the optical axis from an object side surface of the first lens to the imaging surface of the optical imaging lens satisfying:

0.5<SL/TTL<1。

21. the optical imaging lens of claim 16, wherein a separation distance T12 of the first lens and the second lens along the optical axis, a separation distance T34 of the third lens and the fourth lens along the optical axis, a separation distance T45 of the fourth lens and the fifth lens along the optical axis, and a separation distance T78 of the seventh lens and the eighth lens along the optical axis satisfy:

0.8<(T12+T34)/(T45+T78)<1。

22. The optical imaging lens of claim 16, wherein an effective half-caliber DT92 of an image side surface of the ninth lens, an effective half-caliber DT11 of an object side surface of the first lens, and an effective half-caliber DT12 of an image side surface of the first lens satisfy:

0.9<DT92/(DT11+DT12)<1.1。

23. the optical imaging lens of claim 16, further comprising a stop, wherein an effective half-caliber DT52 of an image side surface of the fifth lens, an effective half-caliber DT51 of an object side surface of the fifth lens, and a distance SD along an optical axis from the stop to the image side surface of the ninth lens satisfy:

1<SD/(DT51+DT52)<1.3。

24. the optical imaging lens of claim 16, wherein the abbe number V1 of the first lens satisfies:

40<V1<50。

25. the optical imaging lens of claim 16, wherein a center thickness CT9 of the ninth lens on the optical axis and an edge thickness ET9 of the ninth lens satisfy:

0.6<ET9/CT9<1.6。

26. the optical imaging lens of claim 16, wherein an edge thickness ET6 of the sixth lens and an edge thickness ET5 of the fifth lens satisfy:

1.9<ET6/ET5<3。

27. the optical imaging lens of claim 16, wherein a maximum value Nmax of refractive indices of the first lens to the ninth lens satisfies:

Nmax>1.7。

28. The optical imaging lens of claim 16, wherein at least three of the first to ninth lenses are plastic.

29. The optical imaging lens of claim 16, wherein each adjacent lens of the first lens to the ninth lens has an air gap therebetween.