CN211086769U

CN211086769U - Camera lens

Info

Publication number: CN211086769U
Application number: CN201922001193.3U
Authority: CN
Inventors: 王昱昊; 李洋; 贺凌波; 李建军; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-07-24
Anticipated expiration: 2029-11-19

Abstract

The application discloses a camera lens, which comprises in order from an object side to an image side along an optical axis: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a negative optical power; wherein, the distance EPP on the optical axis from the diaphragm of the camera lens to the object side surface of the first lens satisfies the following conditions: EPP is more than 0mm and less than 0.35 mm; an effective focal length fa45 of the air lens formed by the image-side surface of the fourth lens and the object-side surface of the fifth lens is separated from the optical axis by a distance T45 that satisfies: fa45/T45 is more than or equal to 3.5 and less than or equal to 6.0.

Description

Camera lens

Technical Field

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

Background

In recent years, as the homogenization phenomenon of portable electronic devices such as smartphones and tablet computers is more and more remarkable, the quality of each subdivision function of the portable electronic devices greatly affects the market share of the devices. Among the respective sub-divided functions of the portable apparatus, the image pickup function is additionally emphasized. Users expect images taken through the camera lens of portable electronic devices to approach and even reach the level of professional cameras. In addition, since the portable electronic device needs to satisfy portability characteristics, the space reserved for the image pickup lens by the portable electronic device is limited. In addition, in the case where the imaging lens is, for example, a front camera of a portable electronic apparatus, the size of the imaging lens, particularly, the size of the head portion significantly affects the screen occupation ratio of the portable electronic apparatus. In such a situation, there is a need in the market for an imaging lens that is both compact and has high image quality.

SUMMERY OF THE UTILITY MODEL

An aspect of the present disclosure provides an imaging lens, sequentially from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a negative optical power.

In one embodiment, a distance EPP on an optical axis from a stop of the imaging lens to an object side surface of the first lens may satisfy: EPP is more than 0mm and less than 0.35 mm.

In one embodiment, the effective focal length fa45 of the air lens formed by the image-side surface of the fourth lens and the object-side surface of the fifth lens may satisfy the following requirement, as well as the separation distance T45 on the optical axis between the fourth lens and the fifth lens: fa45/T45 is more than or equal to 3.5 and less than or equal to 6.0.

In one embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the distance EPP on the optical axis from the stop of the image pickup lens to the object side surface of the first lens may satisfy: 0 < EPP/DT11 < 0.5.

In one embodiment, the combined focal length f345 of the third, fourth, and fifth lenses and the effective focal length fa23 of the air lens formed by the image-side surface of the second lens and the object-side surface of the third lens may satisfy: 1.2 < fa23/f345 < 0.

In one embodiment, the total effective focal length f of the imaging lens, the radius of curvature R1 of the object-side surface of the first lens, and the radius of curvature R2 of the image-side surface of the first lens may satisfy: 2.5 < f/R1+ f/R2 < 3.5.

In one embodiment, the total effective focal length f of the imaging lens, the radius of curvature R6 of the image-side surface of the third lens, and the radius of curvature R7 of the object-side surface of the fourth lens may satisfy: f/| R6| + f/| R7| < 2.0.

In one embodiment, the central thickness CT3 of the third lens, the central thickness CT4 of the fourth lens, the separation distance T23 of the second lens and the third lens on the optical axis, and the separation distance T34 of the third lens and the fourth lens on the optical axis may satisfy: the ratio of (CT3+ CT4)/(T23+ T34) is more than or equal to 0.9 and less than 3.

In one embodiment, the abbe number V3 of the third lens, the abbe number V4 of the fourth lens, and the abbe number V5 of the fifth lens may satisfy: 50 < (V3+ V4+ V5)/3 < 60.

In one embodiment, the separation distance ET23 between the edges of the second and third lenses and the separation distance T23 between the second and third lenses on the optical axis may satisfy: 0.1 < ET23/T23 < 0.6.

In one embodiment, the edge thickness ET3 of the third lens and the center thickness CT3 of the third lens may satisfy: ET3/CT3 is more than or equal to 0.5 and less than or equal to 0.7.

In one embodiment, the effective focal length f2 of the second lens and the radius of curvature R4 of the image side surface of the second lens may satisfy: -3.0 ≦ f2/R4 < -1.0.

In one embodiment, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: f4/f5 is more than-1.8 and less than or equal to-1.0.

In one embodiment, the radius of curvature R8 of the image-side surface of the fourth lens and the radius of curvature R9 of the object-side surface of the fifth lens may satisfy: -4.0 < R9/R8 < 0.

In one embodiment, the total effective focal length f of the image pickup lens and the radius of curvature R10 of the image side surface of the fifth lens may satisfy: f/R10 is more than or equal to 3 and less than or equal to 5.5.

In one embodiment, the maximum effective radius DT41 of the object-side surface of the fourth lens and the maximum effective radius DT32 of the image-side surface of the third lens may satisfy: DT41/DT32 is more than or equal to 1.1 and less than or equal to 1.5.

The camera lens has the beneficial effects that the plurality of lenses (for example, five lenses) are adopted, the diaphragm of the camera lens is reasonably moved forwards by reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, so that the camera lens has at least one of small head, good processing formability, high imaging quality and the like.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

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

fig. 2A to 2D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens of embodiment 1;

fig. 3 shows a schematic configuration diagram of an imaging lens according to embodiment 2 of the present application;

fig. 4A to 4D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens of embodiment 2;

fig. 5 shows a schematic configuration diagram of an imaging lens according to embodiment 3 of the present application;

fig. 6A to 6D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens of embodiment 3;

fig. 7 is a schematic configuration diagram showing an imaging lens according to embodiment 4 of the present application;

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

fig. 9 is a schematic configuration diagram showing an imaging lens according to embodiment 5 of the present application;

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

fig. 11 is a schematic configuration diagram showing an imaging lens according to embodiment 6 of the present application;

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

fig. 13 is a schematic configuration diagram showing an imaging lens according to embodiment 7 of the present application;

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

fig. 15 shows a schematic configuration diagram of an imaging lens according to embodiment 8 of the present application;

fig. 16A to 16D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the 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 the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present 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 this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

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

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

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

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

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

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

An image pickup lens according to an exemplary embodiment of the present application may include five lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, respectively. The five lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the fifth lens can have a spacing distance therebetween.

In an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power; the fourth lens may have a positive optical power; the fifth lens may have a negative optical power.

Through the reasonable distribution of the positive and negative focal powers of all the lenses in the camera lens, the low-order aberration of the system can be effectively balanced, so that the system has better imaging quality and processability.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: the EPP is the distance between the diaphragm of the camera lens and the object side surface of the first lens on the optical axis. The size of the head of the optical system can be reduced when the EPP is more than 0mm and less than 0.35mm, and the size of the front camera of the portable electronic product on the screen can be small enough.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 3.5 & lt fa45/T45 & lt 6.0, wherein fa45 is the effective focal length of the air lens formed by the image side surface of the fourth lens and the object side surface of the fifth lens, and T45 is the separation distance of the fourth lens and the fifth lens on the optical axis. The requirement that fa45/T45 is more than or equal to 3.5 and less than or equal to 6.0 is met, so that the optical lens has good processing characteristics, and the distance between the object side surface of the fourth lens and the imaging surface on the optical axis can be ensured to be within a certain range.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 0 < EPP/DT11 < 0.5, where DT11 is the maximum effective radius of the object-side surface of the first lens and EPP is the distance on the optical axis from the stop of the imaging lens to the object-side surface of the first lens. The EPP/DT11 is more than 0 and less than 0.5, the size of the lens can be reduced, the miniaturization of the lens is realized, and the resolution of the lens is improved.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 1.2 < fa23/f345 < 0, where f345 is the combined focal length of the third, fourth, and fifth lenses, and fa23 is the effective focal length of the lens formed by the image-side surface of the second lens and the object-side surface of the third lens. More specifically, fa23 and f345 further satisfy: 1.1 < fa23/f345 < 0. Satisfying-1.2 < fa23/f345 < 0, the aberration of the fringe field can be reduced.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 2.5 < f/R1+ f/R2 < 3.5, where f is the total effective focal length of the imaging lens, R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens. More specifically, f, R1, and R2 may further satisfy: 2.6 < f/R1+ f/R2 < 3.5. The refractive angle of the light beam in the system at the first lens can be effectively controlled, and the system has good processability, and the requirements that f/R1 and f/R2 are more than 2.5 and less than 3.5 are met.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: f/| R6| + f/| R7| < 2.0, where f is the total effective focal length of the imaging lens, R6 is the radius of curvature of the image-side surface of the third lens, and R7 is the radius of curvature of the object-side surface of the fourth lens. More specifically, f, R6, and R7 may further satisfy: f/| R6| + f/| R7| < 1.7. The requirement that f/| R6| + f/| R7| < 2.0 is met, the optical distortion can be reduced, and the good imaging quality of the camera lens is ensured.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 0.9 ≦ (CT3+ CT4)/(T23+ T34) < 3, wherein CT3 is the center thickness of the third lens, CT4 is the center thickness of the fourth lens, T23 is the distance separating the second lens and the third lens on the optical axis, and T34 is the distance separating the third lens and the fourth lens on the optical axis. More specifically, CT3, CT4, T23 and T34 may further satisfy: the ratio of (CT3+ CT4)/(T23+ T34) is more than or equal to 0.9 and less than 2.8. The lens meets the requirement that (CT3+ CT4)/(T23+ T34) < 3 > which is more than or equal to 0.9, is beneficial to uniform size distribution of the lens, ensures the stability of assembly, reduces the aberration of the whole imaging system and shortens the total length of the imaging system.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 50 < (V3+ V4+ V5)/3 < 60, wherein V3 is the Abbe number of the third lens, V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens. More specifically, V3, V4, and V5 may further satisfy: 55 < (V3+ V4+ V5)/3 < 57. The requirement of 50 < (V3+ V4+ V5)/3 < 60 is favorable for matching and harmonizing the whole system lens, and the lens surface shape is optimized by higher degree of freedom to achieve better aberration balance.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 0.1 < ET23/T23 < 0.6, wherein ET23 is a separation distance of edges of the second lens and the third lens, and T23 is a separation distance of the second lens and the third lens on an optical axis. The requirement that ET23/T23 is more than 0.1 and less than 0.6 is met, the curvature of field generated by the front lens and the curvature of field generated by the rear lens of the system can be balanced, and the system has reasonable curvature of field.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 0.5 ≦ ET3/CT3 ≦ 0.7, where ET3 is the edge thickness of the third lens and CT3 is the center thickness of the third lens. The condition that ET3/CT3 is more than or equal to 0.5 and less than or equal to 0.7 is met, the size distribution of the lens is uniform, the assembly stability is ensured, and the aberration of the whole imaging system is reduced.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: -3.0 ≦ f2/R4 < -1.0, where f2 is the effective focal length of the second lens and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, f2 and R4 may further satisfy: 2.9 ≦ f2/R4 < -1.2. Satisfies f2/R4 less than-1.0 more than or equal to-3.0, can reduce the optical distortion and ensure the better imaging quality of the pick-up lens.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: -1.8 < f4/f5 ≦ 1.0, wherein f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens. The optical sensitivity of the fourth lens and the fifth lens can be effectively reduced, and the mass production can be favorably realized.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 4.0 < R9/R8 < 0, wherein R8 is the radius of curvature of the image-side surface of the fourth lens and R9 is the radius of curvature of the object-side surface of the fifth lens. The optical lens meets the requirements that R9/R8 is more than-4.0 and less than 0, and the on-axis aberration generated by the camera lens can be effectively balanced.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: and f/R10 is more than or equal to 3 and less than or equal to 5.5, wherein f is the total effective focal length of the camera lens, and R10 is the curvature radius of the image side surface of the fifth lens. More specifically, f and R10 further satisfy: f/R10 is more than or equal to 3 and less than or equal to 5.4. f/R10 is more than or equal to 3 and less than or equal to 5.5, so that the optical distortion can be reduced, and the camera lens has better imaging quality.

In an exemplary embodiment, an imaging lens according to the present application may satisfy: 1.1 ≦ DT41/DT32 < 1.5, where DT41 is the maximum effective radius of the object-side surface of the fourth lens and DT32 is the maximum effective radius of the image-side surface of the third lens. The size of the lens can be reduced, the miniaturization of the lens is realized, and the resolution of the lens is improved, so that the requirement that DT41/DT32 is more than or equal to 1.1 and less than 1.5 is met.

In an exemplary embodiment, an imaging lens according to the present application further includes a stop disposed between the object side and the first lens. Alternatively, the above-described image pickup lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image forming surface.

The imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, incident light can be effectively converged, the total length of the camera lens is reduced, and the machinability of the camera lens is improved, so that the structure of each lens is more compact, the camera lens is more beneficial to production and processing, and the practicability is higher. With the above configuration, the imaging lens according to the exemplary embodiment of the present application can have characteristics such as a small head, good imaging quality, and the like, and can satisfy the requirements of highly integrated electronic devices for small head cameras.

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

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

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

Example 1

An 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 imaging lens according to embodiment 1 of the present application.

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

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

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

TABLE 1

In the present example, the total effective focal length f of the imaging lens is 3.03mm, the total length TT L of the imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13 of the imaging lens) is 3.96mm, and the maximum field angle FOV of the imaging lens is 83.3 °.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is half the curvature of Table 1 aboveThe inverse of radius R); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S10 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 1, which represents a 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 imaging lens system according to embodiment 1 can achieve good imaging quality.

Example 2

An 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 parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic configuration diagram of an imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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

In this example, the total effective focal length f of the imaging lens is 3.52mm, the total length TT L of the imaging lens is 4.28mm, and the maximum field angle FOV of the imaging lens is 79.4 °.

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

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.1831E-02

8.8917E-02

-7.1039E-01

3.6476E+00

-1.0630E+01

1.8480E+01

-1.8561E+01

9.8072E+00

-2.0121E+00

S2

-9.0805E-02

5.1396E-02

-9.9108E-02

-1.2038E+00

8.4830E+00

-2.3138E+01

3.3912E+01

-2.5532E+01

7.5927E+00

S3

-1.6372E-01

3.1252E-01

-1.4710E+00

5.4220E+00

-1.2695E+01

1.9874E+01

-1.8902E+01

9.7719E+00

-2.3183E+00

S4

-1.1913E-01

4.6095E-01

-2.0101E+00

7.3910E+00

-1.8260E+01

3.0172E+01

-3.2039E+01

2.0427E+01

-6.0732E+00

S5

-2.2843E-01

5.3479E-01

-3.7288E+00

1.7759E+01

-5.5200E+01

1.0810E+02

-1.2864E+02

8.4362E+01

-2.2861E+01

S6

-2.4166E-01

1.2822E-01

-2.7542E-01

6.7862E-01

-1.2759E+00

1.3842E+00

-7.1910E-01

4.5805E-02

8.0368E-02

S7

-6.4303E-02

5.8230E-02

-1.3192E-01

2.0582E-01

-1.9404E-01

1.1044E-01

-3.9529E-02

8.3747E-03

-7.9240E-04

S8

-8.1219E-02

1.9540E-01

-3.4449E-01

4.2766E-01

-3.2534E-01

1.4760E-01

-3.9178E-02

5.6365E-03

-3.4057E-04

S9

-4.2871E-01

8.1209E-02

2.2560E-01

-2.5820E-01

1.4222E-01

-4.5113E-02

8.2614E-03

-8.0381E-04

3.1701E-05

S10

-2.7638E-01

2.0272E-01

-1.0117E-01

3.4256E-02

-7.9198E-03

1.2123E-03

-1.1541E-04

6.0258E-06

-1.2081E-07

TABLE 4

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

Example 3

An 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 configuration diagram of an imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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

In this example, the total effective focal length f of the imaging lens is 4.62mm, the total length TT L of the imaging lens is 5.71mm, and the maximum field angle FOV of the imaging lens is 69.2 °.

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

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

4.8738E-02

3.7096E-03

2.1275E-02

-7.5559E-02

1.9404E-01

-2.9561E-01

2.6824E-01

-1.3116E-01

2.6541E-02

S2

-7.2886E-02

1.4917E-01

4.1023E-02

-1.1509E+00

2.9233E+00

-2.9743E+00

1.1427E-01

2.1903E+00

-1.2554E+00

S3

-1.3279E-01

2.3734E-01

-1.3446E-01

-8.3778E-01

2.5062E+00

-2.8189E+00

6.5185E-01

1.3568E+00

-8.9361E-01

S4

-9.0635E-02

1.2128E-01

1.7291E-02

-8.4504E-01

2.6025E+00

-4.1449E+00

3.8280E+00

-1.8900E+00

3.7948E-01

S5

-1.2231E-01

1.6398E-02

-6.2043E-02

2.2914E-02

-5.3165E-02

1.7100E-01

-2.8250E-01

2.5288E-01

-7.8875E-02

S6

-1.8313E-01

2.2285E-02

-7.3052E-02

9.3180E-02

-5.4716E-02

3.8820E-02

-3.6094E-02

1.9342E-02

-3.8349E-03

S7

-9.9242E-02

-1.1855E-02

4.6404E-02

-1.4814E-01

2.8259E-01

-2.4228E-01

1.0398E-01

-2.1750E-02

1.6890E-03

S8

-6.7548E-02

5.1655E-02

-3.7376E-02

2.4683E-02

-9.4259E-03

2.6823E-03

-7.7188E-04

1.6396E-04

-1.5113E-05

S9

-3.0645E-01

2.1657E-01

-1.3780E-01

7.3642E-02

-2.8852E-02

7.5874E-03

-1.2303E-03

1.0952E-04

-4.0661E-06

S10

-1.2555E-01

8.0767E-02

-4.0035E-02

1.4280E-02

-3.5474E-03

5.8971E-04

-6.2144E-05

3.7418E-06

-9.7750E-08

TABLE 6

Fig. 6A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 6A to 6D, the imaging lens system according to embodiment 3 can achieve good imaging quality.

Example 4

An 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 configuration diagram of an imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

In this example, the total effective focal length f of the imaging lens is 3.09mm, the total length TT L of the imaging lens is 3.88mm, and the maximum field angle FOV of the imaging lens is 81.6 °.

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

TABLE 7

TABLE 8

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

Example 5

An 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 configuration diagram of an imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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

In this example, the total effective focal length f of the imaging lens is 3.93mm, the total length TT L of the imaging lens is 4.68mm, and the maximum field angle FOV of the imaging lens is 77.3 °.

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

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.4339E-02

-1.6942E-02

2.0761E-01

-6.4786E-01

1.1573E+00

-9.6214E-01

5.3292E-02

5.2144E-01

-2.7226E-01

S2

-9.4529E-02

2.0519E-01

-8.1593E-01

2.5949E+00

-6.5445E+00

1.1987E+01

-1.4066E+01

1.0885E+01

-4.4951E+00

S3

-1.4938E-01

5.8998E-01

-2.2120E+00

8.3470E+00

-2.5122E+01

5.1645E+01

-6.5396E+01

4.6991E+01

-1.5111E+01

S4

-1.1902E-01

5.5573E-01

-1.7244E+00

6.0404E+00

-1.7304E+01

3.4423E+01

-4.2956E+01

3.0746E+01

-9.7233E+00

S5

-2.2005E-01

2.3771E-01

-1.3714E+00

6.2641E+00

-2.0294E+01

4.2122E+01

-5.3898E+01

3.8673E+01

-1.1651E+01

S6

-1.8166E-01

3.7089E-02

-1.7620E-01

5.1863E-01

-1.1697E+00

1.6881E+00

-1.4951E+00

7.4374E-01

-1.4974E-01

S7

-1.1514E-01

-2.2209E-03

-1.5076E-01

3.5658E-01

-4.6634E-01

3.4888E-01

-1.1912E-01

8.4557E-03

2.2231E-03

S8

-7.0094E-02

4.7777E-02

-1.6090E-01

2.8191E-01

-2.9325E-01

1.8704E-01

-6.6025E-02

1.1103E-02

-6.1249E-04

S9

-4.1766E-01

1.8101E-01

8.9336E-02

-1.9305E-01

1.4743E-01

-6.5414E-02

1.7326E-02

-2.5163E-03

1.5347E-04

S10

-2.4189E-01

1.9087E-01

-1.0738E-01

4.3011E-02

-1.2120E-02

2.3247E-03

-2.8846E-04

2.0898E-05

-6.7038E-07

Watch 10

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

Example 6

An 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 configuration diagram of an imaging lens according to embodiment 6 of the present application.

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

In this example, the total effective focal length f of the imaging lens is 3.52mm, the total length TT L of the imaging lens is 4.29mm, and the maximum field angle FOV of the imaging lens is 79.0 °.

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

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.6580E-02

2.1766E-02

-2.4877E-01

1.7938E+00

-6.5051E+00

1.4130E+01

-1.8200E+01

1.2976E+01

-3.9141E+00

S2

-9.5752E-02

2.8434E-01

-2.5579E+00

1.2270E+01

-3.7224E+01

7.5135E+01

-9.5140E+01

6.8462E+01

-2.1436E+01

S3

-1.6492E-01

4.2384E-01

-2.4337E+00

9.0207E+00

-2.0653E+01

3.1209E+01

-2.8112E+01

1.2302E+01

-1.6113E+00

S4

-1.0982E-01

3.3859E-01

-1.0428E+00

2.2919E+00

-2.0214E+00

-1.2028E+00

4.6786E+00

-3.7210E+00

7.8277E-01

S5

-2.2087E-01

4.0620E-01

-2.7049E+00

1.3226E+01

-4.3435E+01

8.9646E+01

-1.1187E+02

7.6590E+01

-2.1518E+01

S6

-2.4705E-01

1.5228E-01

-2.7472E-01

4.2489E-01

-4.2039E-01

-1.0452E-01

7.5901E-01

-7.4575E-01

2.5797E-01

S7

-6.8915E-02

7.0128E-02

-1.7290E-01

2.9307E-01

-2.9523E-01

1.7834E-01

-6.6850E-02

1.4606E-02

-1.4129E-03

S8

-8.2122E-02

2.0025E-01

-3.8445E-01

5.1601E-01

-4.1519E-01

1.9718E-01

-5.4603E-02

8.1930E-03

-5.1687E-04

S9

-4.1126E-01

2.7307E-02

2.8167E-01

-2.9514E-01

1.6107E-01

-5.2017E-02

9.8342E-03

-9.9663E-04

4.1258E-05

S10

-2.8806E-01

2.1254E-01

-1.0838E-01

3.7685E-02

-8.8754E-03

1.3628E-03

-1.2701E-04

6.2215E-06

-1.0349E-07

TABLE 12

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

Example 7

An 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 configuration diagram of an imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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

In this example, the total effective focal length f of the imaging lens is 3.33mm, the total length TT L of the imaging lens is 4.07mm, and the maximum field angle FOV of the imaging lens is 78.9 °.

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

Watch 13

TABLE 14

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

Example 8

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

As shown in fig. 15, the imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.

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

In this example, the total effective focal length f of the imaging lens is 3.82mm, the total length TT L of the imaging lens is 4.47mm, and the maximum field angle FOV of the imaging lens is 79.4 °.

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

Watch 15

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.3048E-02

5.7086E-02

-3.9675E-01

1.8131E+00

-4.7491E+00

7.6705E+00

-7.3001E+00

3.7488E+00

-7.7146E-01

S2

-1.0006E-01

4.1815E-01

-2.2988E+00

6.2292E+00

-9.2398E+00

5.8744E+00

4.6007E+00

-9.8091E+00

4.3612E+00

S3

-1.7944E-01

7.4492E-01

-3.5059E+00

1.0670E+01

-2.2936E+01

3.5732E+01

-3.6043E+01

2.0491E+01

-5.1502E+00

S4

-1.4089E-01

5.1572E-01

-1.2896E+00

1.0938E+00

4.5830E+00

-1.7084E+01

2.6207E+01

-1.9708E+01

5.8262E+00

S5

-2.4259E-01

4.6138E-01

-2.6365E+00

1.1972E+01

-3.6765E+01

7.1864E+01

-8.5879E+01

5.7198E+01

-1.6083E+01

S6

-2.2960E-01

1.8569E-01

-5.0432E-01

1.1960E+00

-2.0485E+00

2.2046E+00

-1.3487E+00

3.7883E-01

-1.0144E-02

S7

-6.8024E-02

6.5889E-02

-1.2053E-01

1.4763E-01

-1.1653E-01

5.5007E-02

-1.5065E-02

2.0266E-03

-6.3584E-05

S8

-6.2350E-02

1.2606E-01

-1.7996E-01

1.8308E-01

-1.1726E-01

4.4970E-02

-9.9277E-03

1.1470E-03

-5.2349E-05

S9

-4.7976E-01

2.9570E-01

-8.9108E-02

-1.3615E-02

2.7493E-02

-1.1942E-02

2.5575E-03

-2.7856E-04

1.2351E-05

S10

-2.5462E-01

2.0117E-01

-1.1816E-01

4.9867E-02

-1.4945E-02

3.0882E-03

-4.1656E-04

3.2845E-05

-1.1406E-06

TABLE 16

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

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

Conditions/examples	1	2	3	4	5	6	7	8
									EPP(mm)	0.32	0.32	0.001	0.12	0.20	0.27	0.21	0.32
fa45/T45	4.95	5.55	4.38	5.93	3.51	5.54	4.15	5.48
									EPP/DT11	0.44	0.40	0.001	0.17	0.23	0.33	0.28	0.37
f345/fa23	-1.05	-0.28	-0.05	-0.68	-0.45	-0.29	-0.88	-0.24
									f/R1+f/R2	2.64	3.15	2.94	3.00	3.35	3.16	3.13	3.44
f/\|R6\|+f/\|R7\|	0.16	1.59	0.14	0.39	0.73	1.52	0.18	1.12
									(CT3+CT4)/(T23+T34)	1.49	1.10	2.76	1.51	1.26	1.12	1.25	0.95
(V3+V4+V5)/3	55.99	55.99	55.99	55.99	55.99	55.99	55.99	55.99
									ET23/T23	0.25	0.16	0.51	0.38	0.37	0.24	0.48	0.20
ET3/CT3	0.55	0.63	0.64	0.54	0.65	0.63	0.58	0.67
									f2/R4	-2.27	-2.70	-1.84	-2.37	-1.27	-2.69	-2.48	-2.83
f4/f5	-1.08	-1.25	-1.43	-1.27	-1.67	-1.24	-1.32	-1.53
									R9/R8	-0.81	-0.05	-3.89	-1.01	-1.51	-0.08	-0.86	-0.24
f/R10	5.35	4.05	3.10	4.73	3.80	4.09	4.59	3.88
									DT41/DT32	1.25	1.44	1.12	1.29	1.22	1.44	1.23	1.44

TABLE 17

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described image pickup lens.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a positive optical power;

a second lens having a negative optical power;

a third lens having a positive optical power;

a fourth lens having a positive optical power;

a fifth lens having a negative optical power; wherein the content of the first and second substances,

the distance EPP from the diaphragm of the camera lens to the object side surface of the first lens on the optical axis satisfies the following conditions: EPP is more than 0mm and less than 0.35 mm;

an effective focal length fa45 of the air lens formed by the image-side surface of the fourth lens and the object-side surface of the fifth lens is separated from the optical axis by a distance T45 that satisfies: fa45/T45 is more than or equal to 3.5 and less than or equal to 6.0.

2. An imaging lens according to claim 1, wherein a maximum effective radius DT11 of an object side surface of the first lens and a distance EPP on the optical axis from a stop of the imaging lens to the object side surface of the first lens satisfy: 0 < EPP/DT11 < 0.5.

3. The imaging lens according to claim 1, wherein a combined focal length f345 of the third lens, the fourth lens, and the fifth lens and an effective focal length fa23 of an air lens formed by an image side surface of the second lens and an object side surface of the third lens satisfy: 1.2 < fa23/f345 < 0.

4. The imaging lens of claim 1, wherein a total effective focal length f of the imaging 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: 2.5 < f/R1+ f/R2 < 3.5.

5. The imaging lens according to claim 1, wherein a total effective focal length f of the imaging lens, a radius of curvature R6 of an image-side surface of the third lens, and a radius of curvature R7 of an object-side surface of the fourth lens satisfy: f/| R6| + f/| R7| < 2.0.

6. The imaging lens according to claim 1, wherein a center thickness CT3 of the third lens, a center thickness CT4 of the fourth lens, a separation distance T23 of the second lens and the third lens on the optical axis, and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy: the ratio of (CT3+ CT4)/(T23+ T34) is more than or equal to 0.9 and less than 3.

7. The imaging lens according to claim 1, wherein an abbe number V3 of the third lens, an abbe number V4 of the fourth lens, and an abbe number V5 of the fifth lens satisfy: 50 < (V3+ V4+ V5)/3 < 60.

8. The imaging lens according to claim 1, wherein a distance ET23 separating edges of the second lens and the third lens and a distance T23 separating the second lens and the third lens on the optical axis satisfy: 0.1 < ET23/T23 < 0.6.

9. The imaging lens according to claim 1, wherein an edge thickness ET3 of the third lens and a center thickness CT3 of the third lens satisfy: ET3/CT3 is more than or equal to 0.5 and less than or equal to 0.7.

10. The imaging lens according to claim 1, wherein an effective focal length f2 of the second lens and a radius of curvature R4 of an image side surface of the second lens satisfy: -3.0 ≦ f2/R4 < -1.0.

11. The imaging lens according to claim 1, wherein an effective focal length f4 of the fourth lens and an effective focal length f5 of the fifth lens satisfy: f4/f5 is more than-1.8 and less than or equal to-1.0.

12. The imaging lens according to claim 1, wherein a radius of curvature R8 of an image-side surface of the fourth lens and a radius of curvature R9 of an object-side surface of the fifth lens satisfy: -4.0 < R9/R8 < 0.

13. The imaging lens according to claim 1, wherein a total effective focal length f of the imaging lens and a radius of curvature R10 of an image side surface of the fifth lens satisfy: f/R10 is more than or equal to 3 and less than or equal to 5.5.

14. The imaging lens according to claim 1, wherein a maximum effective radius DT41 of an object side surface of the fourth lens and a maximum effective radius DT32 of an image side surface of the third lens satisfy: DT41/DT32 is more than or equal to 1.1 and less than or equal to 1.5.

15. The imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a positive optical power;

a second lens having a negative optical power;

a third lens having a positive optical power;

a fourth lens having a positive optical power;

a total effective focal length f of the imaging 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: 2.5 < f/R1+ f/R2 < 3.5.

16. The imaging lens according to claim 15, wherein a distance EPP on the optical axis from a stop of the imaging lens to an object side surface of the first lens satisfies: EPP is more than 0mm and less than 0.35 mm.

17. The imaging lens of claim 15, wherein an effective focal length fa45 of an air lens formed by the image-side surface of the fourth lens and the object-side surface of the fifth lens is a distance T45 from the fourth lens and the fifth lens on the optical axis that satisfies: fa45/T45 is more than or equal to 3.5 and less than or equal to 6.0.

18. An imaging lens according to claim 15, wherein a maximum effective radius DT11 of an object side surface of the first lens and a distance EPP on the optical axis from a stop of the imaging lens to the object side surface of the first lens satisfy: 0 < EPP/DT11 < 0.5.

19. The imaging lens of claim 15, wherein a combined focal length f345 of the third, fourth, and fifth lenses and an effective focal length fa23 of an air lens formed by an image-side surface of the second lens and an object-side surface of the third lens satisfy: 1.2 < fa23/f345 < 0.

20. The imaging lens of claim 15, wherein a total effective focal length f of the imaging lens, a radius of curvature R6 of an image-side surface of the third lens, and a radius of curvature R7 of an object-side surface of the fourth lens satisfy: f/| R6| + f/| R7| < 2.0.

21. The imaging lens according to claim 15, wherein a center thickness CT3 of the third lens, a center thickness CT4 of the fourth lens, a separation distance T23 of the second lens and the third lens on the optical axis, and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy: the ratio of (CT3+ CT4)/(T23+ T34) is more than or equal to 0.9 and less than 3.

22. The imaging lens according to claim 15, wherein an abbe number V3 of the third lens, an abbe number V4 of the fourth lens, and an abbe number V5 of the fifth lens satisfy: 50 < (V3+ V4+ V5)/3 < 60.

23. The imaging lens according to claim 15, wherein a distance ET23 between edges of the second lens and the third lens and a distance T23 between the second lens and the third lens on the optical axis satisfy: 0.1 < ET23/T23 < 0.6.

24. The imaging lens of claim 15, wherein the edge thickness ET3 of the third lens and the center thickness CT3 of the third lens satisfy: ET3/CT3 is more than or equal to 0.5 and less than or equal to 0.7.

25. The imaging lens of claim 15, wherein an effective focal length f2 of the second lens and a radius of curvature R4 of an image side surface of the second lens satisfy: -3.0 ≦ f2/R4 < -1.0.

26. The imaging lens of claim 15, wherein an effective focal length f4 of the fourth lens and an effective focal length f5 of the fifth lens satisfy: f4/f5 is more than-1.8 and less than or equal to-1.0.

27. The imaging lens of claim 15, wherein a radius of curvature R8 of an image-side surface of the fourth lens and a radius of curvature R9 of an object-side surface of the fifth lens satisfy: -4.0 < R9/R8 < 0.

28. An imaging lens according to claim 15, wherein a total effective focal length f of the imaging lens and a radius of curvature R10 of an image side surface of the fifth lens satisfy: f/R10 is more than or equal to 3 and less than or equal to 5.5.

29. The imaging lens according to claim 15, wherein a maximum effective radius DT41 of an object side surface of the fourth lens and a maximum effective radius DT32 of an image side surface of the third lens satisfy: DT41/DT32 is more than or equal to 1.1 and less than or equal to 1.5.